[HN Gopher] The Revenge of the Hot Water Bottle
       ___________________________________________________________________
        
       The Revenge of the Hot Water Bottle
        
       Author : Glench
       Score  : 155 points
       Date   : 2022-01-21 14:11 UTC (8 hours ago)
        
 (HTM) web link (www.lowtechmagazine.com)
 (TXT) w3m dump (www.lowtechmagazine.com)
        
       | swilliamsio wrote:
       | The fact that this website is solar powered is very, very cool to
       | me. I will have to come back in a few hours and see if the
       | Spanish night has taken it offline.
        
       | pier25 wrote:
       | I'm from Mallorca (Spain) and there you can still find tables
       | with a brazier underneath. Hot water bottles made from rubber are
       | very common too.
       | 
       | https://images.app.goo.gl/DG73Vs74i6RgQbyk7
        
         | harperlee wrote:
         | Huge carbon monoxide intoxication risk!
        
       | Oem18 wrote:
        
       | kowlo wrote:
       | My wife gifted me a hot water sausage for work
       | https://www.amazon.co.uk/dp/B08J2FK6KZ
       | 
       | Mine is a little longer...
        
       | llampx wrote:
       | In my opinion, electric blankets are a superior alternative to
       | hot water bottles. They come in various forms such as throws,
       | pillows and mattress toppers, and can be adjusted for temperature
       | and don't need to be refilled. The only place they don't work is
       | when you're on the move. For that you can nowadays get gloves
       | with active heating that are powered by batteries, or chemical
       | reaction handwarmers.
       | 
       | A good creative writing piece, but somewhat out of touch.
        
         | asciimov wrote:
         | You can't use electric blankets on foam beds as the foam
         | retains too much heat and you could end up cooking yourself.
        
         | edent wrote:
         | The problem is, once the blanket loses power it gets cold
         | pretty quickly.
         | 
         | Whereas you can boil a kettle in under a minute, decant the
         | water, and you can stay warm for hours.
        
           | gruez wrote:
           | That doesn't sound like a problem unless you're moving about.
           | If you're just sitting at your desk who cares if you need to
           | keep it plugged in?
        
             | rstupek wrote:
             | I think the point is "what if there's no electricity but
             | the gas stove still works"
        
         | helipad wrote:
         | Your suggested solutions don't work so well for sitting
         | outside.
         | 
         | When Covid made outdoor socializing necessary, we used out hot
         | water bottles at restaurants and at fire pits.
         | 
         | Blankets and gloves aren't as good at keeping nether regions
         | warm on cold surfaces, and anything that needs to be plugged in
         | is a no go. A minor point too but I wouldn't want
         | batteries/electrics around fire.
         | 
         | Our hot water bottles kept us toasty for hours and you could
         | also tell easily when it was running out of power, so to speak.
         | 
         | We've also taken them to winter cabins when you don't know how
         | convenient electrical outlets will be. You can have several of
         | them for when you're on the sofa, to pre-warm the bed, make the
         | dog cozy.
        
         | tstrimple wrote:
         | I would hope that Low Tech Magazine would focus more on "low
         | tech" solutions, such as solutions which don't require
         | electricity.
        
           | llampx wrote:
           | You got me there.
        
           | wffurr wrote:
           | You gotta heat the bottle; the most efficient method of which
           | is an electric kettle.
        
             | TremendousJudge wrote:
             | But electricity is not required, you can use a regular
             | kettle on a stove or even over a wood fire.
        
               | floren wrote:
               | You're not allowed to get a gas stove in California any
               | more.
               | 
               | Good thing we never have electric supply issues.
        
               | tstrimple wrote:
               | This isn't true. The requirement is just that new
               | constructions are ready for electric appliances. It
               | doesn't ban natural gas.
               | 
               | https://www.sfchronicle.com/local/article/No-more-gas-
               | stoves...
               | 
               | > A draft code update released Thursday by the California
               | Energy Commission would require new single-family homes
               | to be equipped with circuits and panels that would allow
               | them to be powered by all-electric appliances for
               | heating, cooking and drying clothes.
               | 
               | > The new code would not prohibit natural gas
               | infrastructure, a step many environmentalists would like
               | the state to take. But if the draft is ultimately
               | authorized by the commission this year, it would require
               | new homes to be "electric ready," meaning they're
               | prepared to be transitioned away from gas appliances if
               | any are used initially.
        
             | YXNjaGVyZWdlbgo wrote:
             | If you get a cold snap like in Texas last year with rolling
             | blackouts it's the perfect way to store the heat you can
             | produce while your electricity is running. When I camp in
             | late fall, early winter I always use a food safe water
             | bottle at night and reuse the water in the morning for
             | coffee or washing up with the added benefit that with a
             | good bottle the water is at least lurk warm.
        
             | Someone wrote:
             | I don't think so. On sunny winter days, you can heat them
             | in the sun, using a solar water heater
             | (https://en.wikipedia.org/wiki/Solar_water_heating) and let
             | them cool down at night, heating your body.
             | 
             | The low tech version is to paint them black and put them in
             | the focus of a roughly parabolic reflector.
        
           | nradov wrote:
           | You can build a low tech electricity generator with a water
           | wheel in the stream that runs behind your quaint little low
           | tech log cabin in the woods.
        
             | tstrimple wrote:
             | This is one of my favorite YouTube channels. Not quite "low
             | tech" because he has a ton of tools he powers off grid, but
             | he nails the quaint cabin feel with the house he built.
             | 
             | https://www.youtube.com/watch?v=0zh29DJI_wE&list=PLEZ2hvCDK
             | U...
        
       | BenoitEssiambre wrote:
       | I do ice in the summer (this is mentioned in the article). Great
       | for when you have warm feet in bed. It works longer than the hot
       | bottles because of the phase change which adds the equivalent of
       | a 60 to 70 Celsius energy absorption.
       | 
       | I think you could do the same with wax for the hot version. Hot
       | wax would last longer than hot water because of the phase change.
       | I assume this is not commercially available because of the
       | dangers of heating wax which should be done in a hot water bath.
       | Some people would inevitably ignore the instructions and burn
       | down their house.
       | 
       | Edit after a bit of research: Maybe the lesser heat capacity of
       | wax offsets the benefits of the phase change.
        
         | GuB-42 wrote:
         | Besides heat capacity, the advantage of liquid hot wax is that
         | it stays at around 50degC during the entire melting process,
         | which is a good temperature for something that keeps you warm.
         | 
         | Instead of staying at an ideal temperature, water will
         | gradually cool down.
        
         | nickparker wrote:
         | Water also has an almost uniquely large enthalpy of melting. EG
         | paraffin freezing releases 1/3 as much heat as water
        
         | YXNjaGVyZWdlbgo wrote:
         | I use a cooling pad [0] for animals and it's amazing no
         | electricity just convection.
         | 
         | [0] https://www.amazon.com/Chillz-Cooling-Dogs-Large-
         | Size/dp/B00...
        
       | blakesterz wrote:
       | "The first "hot water bottles" - quite literally - were other
       | people and animals. Since time immemorial, people have warmed
       | themselves by huddling together"
       | 
       | I had to chuckle at that! Low Tech Magazine is such a cool site!
       | So many really interesting things to read about there, low tech
       | hacking at it's finest.
        
       | josefresco wrote:
       | When my mother was a child (Northeast US), they'd take baked
       | potatoes to bed to keep their feet warm. Growing up we had one of
       | the soft/red hot water "bottles" and it was used mostly when
       | someone was in pain or sick.
        
         | nickkell wrote:
         | They also double as a midnight snack
        
           | josefresco wrote:
           | My mom said they'd bring them to school the next day for
           | lunch.
        
         | adventured wrote:
         | One side of my family were farmers in prior generations (mid-
         | Atlantic US). They utilized heated bricks in the same way that
         | you're describing the potatoes.
        
           | logosmonkey wrote:
           | Yeah, my mom (grew up in the rural south US) has told me
           | multiple times about how her mom would heat bricks fro the
           | beds each evening. They were very poor and had no central
           | heat so wood stove, bricks, and multiple kids to a bed (there
           | were 13 of them) was the go to winter strategy.
        
       | kevinmchugh wrote:
       | Very off-topic but if you've never seen someone inflate and burst
       | a hot water bottle, it's really something. It's one of those
       | goofy strongman feats, like tearing a phonebook in half, with a
       | big bang at the end.
       | 
       | https://youtu.be/oM5ZzR2KBSQ
        
         | DaltonCoffee wrote:
         | Heheh, love that seam line.
        
       | exhilaration wrote:
       | If you need something portable while walking around the house, I
       | recently bought this rechargeable heated vest for my wife
       | https://fieldsheer.com/products/summit-vest-women-s# who hates
       | the cold. She LOVES this vest, wears it every evening. This was
       | possibly my most successful gift in our 12 year marriage.
       | 
       | And I don't mean to keep promoting this brand but I've got their
       | heated ski gloves too and they're amazing. I was night skiing and
       | saw that one of the ski patrol ladies had a lit LED on her
       | gloves. I asked her what that was and he told me it was this:
       | https://fieldsheer.com/collections/womens/products/storm-glo...
       | (wait, I wear women's gloves?) They're fantastic, I wore them
       | skiing in 10oF Vermont weather from 9am to 3pm on low heat. The
       | batteries died around 3ish but I had hand warmers after that.
        
         | amelius wrote:
         | I want a sleeping bag with this.
        
           | mellavora wrote:
           | Which "this", a warm and grateful spouse, or a hot water
           | bottle?
        
         | JKCalhoun wrote:
         | Put off by the Bluetooth + phone app. Can you change the
         | temperature _without_ an app?
        
           | tppiotrowski wrote:
           | "The Summit Heated Vest has 2 ways to adjust the temperature.
           | First, the built-in waterproof touch control button. With a
           | simple button push, it lets you choose from 4 instant heat
           | settings with multi-colored LED indicator."
        
           | mcguire wrote:
           | Anyone else notice the irony given the article?
           | 
           | " _Low-tech Magazine questions the blind belief in
           | technological progress, and talks about the potential of past
           | and often forgotten knowledge and technologies when it comes
           | to designing a sustainable society._ "
        
           | exhilaration wrote:
           | Oh yes, we don't use the bluetooth functionality at all.
           | Everything on the vest is button-operated.
        
         | gertrunde wrote:
         | Favourite quote/snippet from the linked vest page:
         | 
         | "update your garments when new firmware becomes available."
         | 
         | Now there's a sentence that I suspect we wouldn't have imagined
         | 10 years ago...
        
           | jimmaswell wrote:
           | I recently got a whole series of heated gloves, socks, coat,
           | etc., and when I have them all on I think of the preacher
           | from Johnny Mnemonic.
        
         | odiroot wrote:
         | It's funny, but I'd like to have the complement of that! I'm
         | never cold in my torso, it's always only the arms and hands.
        
           | calt wrote:
           | Heat your torso and the arms and hands will get better
           | circulation and feel warmer as well.
        
         | Toutouxc wrote:
         | Can anyone recommend a well made EU-based alternative? The
         | Fieldsheer collection looks great, but duties and taxes.
        
           | semi-extrinsic wrote:
           | My parents have used the Therm-IC products for years,
           | especially socks for skiing, they've been happy with them.
           | 
           | Personally I find that either I'm doing low intensity
           | physical activity and I can just put on my Sorel Glacier XT
           | boots and Hestra Army Leather mitts and stay warm, or I'm
           | doing something more high intensity and my feet and hands
           | only need normal boots and gloves.
           | 
           | In both cases I wear a thick merino base layer, fleece
           | midlayer with varying thickness according to temperature and
           | activity level, and GoreTex Pro outer layer that has zippers
           | under arms and along thighs such that you can adapt
           | ventilation seamlessly to variations in activity level. This
           | works nicely from +5 C all the way down to -30 or -40 C
           | (depending on wind chill and humidity, you might not last
           | very long at -40 C though).
        
         | grogenaut wrote:
         | Wonder if they sell just the heat and controls. My wife
         | wouldn't like the material / style but would love to make her
         | own
        
           | mikestew wrote:
           | I say this only so that you know it's worth searching,
           | because I don't have any links handy at the moment: yes, you
           | can buy the wiring or carbon inserts separately as well as
           | some kind of controller. I say this because I've previously
           | researched such things for making heated motorcycle clothing
           | (which, when combined with the higher power of a motorcycle
           | electrical system, will keep you _balmy_ for as long as the
           | bike is running). One can do anything from sourcing your own
           | wire to buying pre-made carbon inserts (such as in heated
           | auto seats), to kits you just sew into the clothing. There
           | are pages that will tell you how to do the math for wattage
           | draw, etc., should you need such.
           | 
           | It's been a number of years since I've done this research, so
           | your options should be even more broad now, because heated
           | clothing that isn't motorcycle/snowmobile-specific is a
           | relatively new thing (thanks, lithium batteries!).
           | 
           | Anyway, the stuff is out there, you'll just have to go look
           | for it.
        
         | masklinn wrote:
         | FWIW an other option which turns out to be quite ridiculous for
         | heat is the _hanten_ (japanese winter vests).
         | 
         | They're thick padded cotton, and once the vest has warmed up
         | (which doesn't take too much time) it's _really_ warm and
         | comfy, if a tad bulky.
        
           | Tronno wrote:
           | Wool is more effective insulation than cotton, and also
           | insulates when damp/wet, unlike cotton (thus the saying
           | "cotton kills"). I suspect the reputation of this type of
           | jacket is more cultural than anything.
        
           | dahfizz wrote:
           | Isn't that just a regular jacket, in Japanese style?
        
             | masklinn wrote:
             | Not really. In terms of length it sits somewhere between
             | jacket and coat, but is also very much designed to be worn
             | indoor (as traditionally japan doesn't use central
             | heating). It doesn't much protect against the elements as
             | it has a non-overlapping lapel with cords stiched on the
             | edge for closure. In essence the front is mostly open, even
             | when tied.
        
               | recursive wrote:
               | I didn't even know jackets and coats were different
               | things.
        
         | randycupertino wrote:
         | > This was possibly my most successful gift in our 12 year
         | marriage.
         | 
         | My husband got me this heated blanket from LL Bean and it is my
         | absolute favorite gift he's given me in 15 years together! This
         | thing is amazing! I want to wfh just to curl my feet in the
         | blanket. https://www.llbean.com/llb/shop/124706
         | 
         | I want to get one for every family member now.
        
         | dehugger wrote:
         | I also got my wife a similar one a couple of years ago, and it
         | definitely marks the high-water mark for gift giving. I doubt
         | I'll ever be able to live up to it. You can also buy a spare
         | battery as a follow up gift the next year.
         | 
         | Now if only she would gift me one in return...
        
       | JohnJamesRambo wrote:
       | I would never use one of these because I know how clammy and cold
       | it is going to be when the heat runs out.
        
         | thrwy_ywrht wrote:
         | Many/most hot water bottles have a knitted fabric cover. When
         | the heat runs out (which takes many hours), you are not in
         | direct contact with the rubber/plastic body of the water
         | bottle, so there is no sensation of cold or clamminess.
        
         | DocTomoe wrote:
         | Hm, the ones I am using usually are still warmer than body
         | warmth on the next morning... YMMV
        
         | Flashtoo wrote:
         | An alternative would be something like a bag of rice or cherry
         | stones. You can microwave them and they won't feel cold when
         | they lose their heat.
         | 
         | (See also https://news.ycombinator.com/item?id=30025026)
        
         | kaybe wrote:
         | The coldest they become is body temperature under the blanket.
         | It would only have a chance to become colder than its
         | surroundings if the water had a way to evaporate, which it
         | doesn't.
        
       | thrwy_ywrht wrote:
       | Hot water bottles are very popular in the UK for three main
       | reasons that don't really translate to the US:
       | 
       | * Every household has an electric kettle
       | 
       | * Kettles boil very quickly (due to power differences)
       | 
       | * Most households have radiator-style heating, which takes much,
       | much longer to heat up a room than US-style forced-air heating
        
         | frankus wrote:
         | I'm semi-seriously considering installing a few 240V outlets in
         | my kitchen when I redo it and smuggling in a European kettle
         | (any recommendations on a nice temperature-controlled one? I
         | use and like this 120V now: https://www.amazon.com/Bonavita-
         | BV382510V-Variable-Temperatu...)
         | 
         | The US secretly has 240V power almost everywhere, but we use
         | center-tapped transformers upstream of the service connection
         | that provide two 120V legs (180 degrees out of phase). So
         | lighting and appliances all get 120V (typically 15A), with the
         | exception of high-power items like cooktops, ovens, and these
         | machines we have for drying our laundry indoors.
        
           | Karrot_Kream wrote:
           | My partner and I use hot water bottles extensively (we both
           | grew up in immigrant households that used them). We have a
           | hot water boiler that we schedule to run in the early hours
           | of the morning before any of us are up to use cheaper energy
           | and have the water ready for us. We use the boiler for hot
           | water bottles, for brewing tea, for brewing coffee (well I'm
           | picky with coffee so I reheat the water to exact temp on an
           | old-fashioned stove kettle), for boiling noodles or pasta,
           | for cleaning caked on grime, etc etc.
           | 
           | I'd suggest that over redoing your outlet, though you will
           | have to periodically descale your water boiler, because of
           | sheer utility and portability (you can move and you'll still
           | be able to just plug it into a standard 1-phase 120V outlet.)
        
           | maccard wrote:
           | What you want is an instant water tap like a quooker.
        
         | 99_00 wrote:
         | I live somewhere cold and damp. I need this. Thermal clothes
         | and turning up the heat doesn't help.
         | 
         | Recently we had a bought of dry cold weather. In -10 C and dry
         | I was wearing less insulation and feeling warmer than +5 C with
         | high humidity. Real eye opener to understanding the impact of
         | humidity and how I can adapt to my winter climate better.
        
       | mberning wrote:
       | It's baffling that people have such a persistent and romantic
       | fascination with regressive technology. Why enjoy whole home
       | climate control when you can dress up like Nanook of the North
       | while indoors and sit on hot water bottles? Why is the discussion
       | not focused on how to make modern technology better, more
       | efficient, more accessible?
       | 
       | Next week we will have a story about how suffering through summer
       | heat with a wet towel and sleeping all day are "making a
       | comeback".
        
         | oh_sigh wrote:
         | > Why enjoy whole home climate control
         | 
         | Because it is more expensive and more energy intensive than a
         | direct application of heat to the occupant's skin?
         | 
         | Some people care about their resource usage, or how much money
         | they spend on climate control. You also have situations where
         | multiple people live in the same climate control zone, and have
         | different preferences for temperature. If I like it at 67 and
         | my wife likes it at 74, and we're both uncomfortable at 70, how
         | can whole home climate control solve this issue?
        
           | bhandziuk wrote:
           | baffles, fans, AC and heat running at the same time,
           | bluetooth location tracking, robots following you around with
           | the right climate controlled temperature application,
           | monitoring your brow and toes with IR cameras to check that
           | you are perfectly comfortable. Duh, modern technology ftw!
        
         | Alekhine wrote:
         | You _can 't_ always make modern tech as energy efficient as
         | 'regressive' technology. There isn't always a magical solution
         | that addresses all problems. In my opinion, low-tech solutions
         | are often just simpler, while maybe lacking a bit of
         | convenience.
         | 
         | Here's an example, the open source community has spent
         | thousands of man hours developing various note-taking apps. And
         | they're pretty good, usually. I could use something like Foam
         | to manage my notes, learn to use the keyboard shortcuts, figure
         | out how to sync it between my devices, learn every other little
         | thing about it...
         | 
         | Or I could just use pen and paper. Which requires no
         | electricity, no computer, is durable and does not have a
         | learning curve to use.
        
         | analyte123 wrote:
         | Whole home climate control costs money. Why run up your gas or
         | electric bill to heat your entire 2000 sqft house to 78
         | degrees, when the only thing that needs that much heat is your
         | own body?
        
         | ssully wrote:
         | Some people have poor circulation. Even with whole home climate
         | control their extremities (hands or feet) will be ice cold for
         | awhile. Sure, there are more modern ways to warm your hands and
         | feet, but a hot water bottle is cheap and easy.
        
           | masklinn wrote:
           | Also heating up one's entire dwelling to comfortable-enough
           | temperatures could be much more expensive than dressing up a
           | bit and using that sort of accessories.
        
         | wolverine876 wrote:
         | Why write a few lines of code when you can use an entire
         | framework? Why walk two blocks or ride a bike when you can
         | drive?
         | 
         | > regressive
         | 
         | That depends on your definition of regressive. If you designate
         | it as regressive, you create a circular argument: it must be
         | worse, somehow.
         | 
         | IMHO, there's nothing inherently better about tech that is
         | newer - why do I care if it's newer? - and many see complexity
         | as the enemy of good engineering. Technology is tools and the
         | only question is, how well do they deliver on the needs and
         | specifications (which include efficiency and cost)?
         | 
         | > Why enjoy whole home climate control ...
         | 
         | Whole home climate control has more whole world climate impact,
         | so it doesn't deliver well on many people's specifications.
        
         | unbalancedevh wrote:
         | That was my first thought as well, but the article is pretty
         | thorough about the relative benefits of using a hot water
         | bottle, also asserting that the intent isn't to replace central
         | heating.
         | 
         | It's an option with some cultural history behind it, and might
         | be just the right solution for some use cases.
        
       | tupac_speedrap wrote:
       | They are good but make sure that the bottle is sealed properly
       | and you don't have the bottle over your body while you sleep
       | because people getting burned by these things is surprisingly
       | common.
        
       | Cerium wrote:
       | In China there are hot water bags with integrated heating
       | elements and thermostatic cutoff. I'm sure they are a single
       | failure away from a steam explosion, but very convenient. I used
       | some while visiting family in the winter.
        
       | ColinWright wrote:
       | Also discussed here:
       | 
       | https://news.ycombinator.com/item?id=30024127
       | 
       | We now use "Wheat Bags" ... cloth bags, usually cylindrical,
       | filled with wheat. Heat in a microwave and use where one would
       | use a hot-water bottle, but without the danger of a leak.
        
         | drewzero1 wrote:
         | They can certainly still leak, but the consequences are
         | different. Instead of getting wet and risking water damage you
         | have to sweep and vacuum wheat (or in my case rice) out of
         | everything. Still, much less harmful to electronics and wood
         | floors.
        
           | hammock wrote:
           | How about a big slug of cast iron? :)
        
             | voltagedivider wrote:
             | It wouldn't play nice with water and microwave ovens. I
             | guess you could heat it on the stove or in a regular oven
             | instead.
        
               | hammock wrote:
               | Yes that's the idea
        
               | masklinn wrote:
               | There used to be such device you'd heat up in boiling
               | water.
        
         | NikolaeVarius wrote:
         | Why wheat? The point of using water is that it can store alot
         | of heat.
        
           | ip26 wrote:
           | I think they are usually husks of some type. Cheap, smell
           | nice, conform to body, doesn't transfer heat fast enough to
           | hurt you, and for some reason heats up in microwaves.
        
             | QuercusMax wrote:
             | Not husks - those don't have enough heat capacity. I've
             | used ones made of corn and rice too. It's heating up the
             | actual grain seeds, which I guess have a fair amount of
             | water locked in the starch matrix. It always is a little
             | steamy coming out of the microwave.
        
             | GordonS wrote:
             | You can get ones with some lavender inside too - my kids
             | love them!
        
           | PeterisP wrote:
           | If it's not dry husks but full grain, they're mostly water by
           | weight anyway, so you get almost the same heat storage but
           | different other properties (no leaks, slower dispersal of
           | heat).
        
           | jonnycomputer wrote:
           | Rice works. Can just put in a sock and heat in microwave.
        
             | tempest_ wrote:
             | We made these as gifts for our parents when I was in
             | elementary school.
             | 
             | You can pop a clove or two in as well to mask the rice
             | scent.
        
               | jonnycomputer wrote:
               | nice idea!
        
         | brummm wrote:
         | They are very traditional and common in Germany. I remember
         | making them in primary school and selling at something like a
         | "bake sale".
        
         | mikro2nd wrote:
         | And they're not ice-cold sometime around 3 in the morning! They
         | stay at around body heat, so still give the feeling of being
         | warm.
        
           | teachrdan wrote:
           | If you want to really spoil yourself or your partner, place
           | the hot water bottle in bed about an hour early -- and then,
           | just before going to sleep, refill it with fresh hot water.
           | 
           | I find that between the bottle itself and the surrounding
           | sheets and mattress, a lot of heat is absorbed in that first
           | hour. Pre-heating everything should keep the hot water bottle
           | warm until morning. I find this to be an unreasonably
           | effective life hack.
        
           | themodelplumber wrote:
           | Yep, this is a huge benefit over water bottles. I tested out
           | both and it's nice to have water as a backup but the residual
           | heat effect has a longer tail-off.
        
           | yakshaving_jgt wrote:
           | I wasn't aware that this was a thing that happened. I use a
           | hot water bottle now -- the typical flexible rubber one,
           | encased in a little wooly jumper. I typically go to bed
           | around 01:30 with the hot water bottle under the covers near
           | my feet, and it's still warm around noon. I'm getting at
           | _least_ 12 hours of warmth from mine each night.
        
           | SamBam wrote:
           | Huh? Water has a significantly-higher specific heat capacity
           | than these dry powders, so will definitely stay warm many,
           | many hours longer. I can say this with experience: the hot
           | water bottle I put in my bed at midnight last night was still
           | warm at 7:30am, while the buckwheat cushions I got my kids
           | stay warm 15 minutes tops, no matter how hot I make them in
           | the microwave.
           | 
           | Even with the very best dry microwavable pillows, there will
           | be at least a 20x difference in heat capacity.
           | 
           | And your premise doesn't make sense. A hot water bottle under
           | the blankets will _also_ be at body temperature after (many)
           | hours. There 's no reason for it to get colder than the wheat
           | pillows. And the fabric covering feels just as warm.
        
             | masklinn wrote:
             | IME they're not necessarily wrong, HWBs without fabric
             | covering (which used to be relatively frequent a few
             | decades back for some reason) would feel really rather cold
             | in the morning, the rubber feels clammy. And because they'd
             | be way too warm early on, you'd push them to one side and
             | get close but not too close. So body heat wouldn't really
             | keep them warm once their eat is expended.
             | 
             | With a woolen cover or padded cotton, the heat release is
             | much slower and more uniform, so the HWB is more
             | comfortable, last a lot longer, and because you only touch
             | (relatively insulating / insulated) fabric it never feels
             | really cold.
        
             | zokier wrote:
             | I think the effect is more related to that water conducts
             | heat well, while cereal pillow will function as insulator.
        
         | kayodelycaon wrote:
         | I've done this with rice. :)
        
         | 2Gkashmiri wrote:
         | wait what? you mean dry bags.... ooooo
        
           | ColinWright wrote:
           | Yes ... more discussion here:
           | 
           | https://news.ycombinator.com/item?id=30025026
        
         | germinalphrase wrote:
         | We use rice, but same idea.
        
         | themodelplumber wrote:
         | I use these too, though ours are made with corn for some
         | reason. I guess the friends who gifted them were hanging with
         | the corn crowd on craft-Pinterest or something. They smell like
         | sweet Corn Nuts when heated, which is a pretty pleasant effect.
         | 
         | We do have a cylindrical one but the two biggest are shaped
         | like mini pillows, more rectangular patterned.
         | 
         | Combine them with a lap blanket, hot tea, brand new thick
         | winter socks, insulated slippers, a hoodie, 50 push-ups before
         | work and a 400W zone heater, and you will be able to survive my
         | office in the winter :D
        
           | rambambram wrote:
           | Exactly this haha. Even a relatively mild workout keeps my
           | body warm for hours. For cycling in the winter (which feels
           | especially cold after a warm bed) I used to take cold showers
           | before going outside. I can really recommend this, as the
           | outside temperature feels way more pleasant this way. Instead
           | of shivering the whole trip, I actually enjoyed going
           | outside. Besides, it mentally wakes you up like nothing else.
           | 
           | Edit: and indeed, don't forget the winter socks! I prefer
           | them in wool. Also a baggy fleece sweater/vest made of polar
           | fleece (which I can't find anywhere anymore) with the
           | thickest and highest collar possible.
        
         | fredley wrote:
         | I find they don't keep their heat nearly as long as hot water
         | bottles.
        
         | boringg wrote:
         | Also known as "magic bags" if you want to buy a premade one to
         | put around your neck!
        
         | phreeza wrote:
         | One of those (or similar, I think cherry seeds) caught fire in
         | my microwave once.
        
           | monkeybutton wrote:
           | Never had one catch fired but definitely overdone it before
           | and had it forever smell vaguely like burnt popcorn.
        
           | drewzero1 wrote:
           | I tried to heat two rice bags at the same time once and they
           | melted together. I didn't think about the fact that they had
           | used synthetic fabric! I'm so used to doubling the cooking
           | time because our microwave is only 600 watts (compared to the
           | usual 1000-1200 watts).
        
           | ColinWright wrote:
           | Indeed. It needs to be heated for 30 seconds, then "stirred",
           | heating again, _etc.,_ and the temperature needs to be
           | limited. We had one catch fire, but we patched it and it 's
           | good to go again.
           | 
           | I still prefer them over hot water containers. We have some
           | that are floppy and flexible, ideal for wrapping around the
           | back of the neck and over the shoulders.
        
             | jgrahamc wrote:
             | I have one of these that has cherry stones in it. I much
             | prefer the hot water bottle for two reasons. Firstly, I
             | fully understand the failure mode of the hot water bottle
             | and have rarely seen one fail; on the other hand the "cloth
             | thing that catches fire inside the microwave" is not a
             | failure mode I really want.
             | 
             | But most importantly, hot water bottles are really hot and
             | much better at keeping me warm.
        
               | ColinWright wrote:
               | We've had more than one hot water bottle fail and it's
               | resulted in one case in a soaked bed, which was
               | unpleasant and difficult to deal with. I _much_ prefer
               | the failure mode of  "catches fire in the microwave". The
               | fire is small (and mostly just a smouldering edge of
               | fabric), easily contained, easily put out, and the
               | failure is easily avoided.
               | 
               | We've used both and settled on the wheat bag, but I
               | recognise that other people will make other choices, and
               | that's fine.
        
         | joncp wrote:
         | You can just fill a sock with dry rice and tie it off. It's
         | cheap and easy and the hot rice smells good too.
        
         | hilbert42 wrote:
         | _"...use where one would use a hot-water bottle, but without
         | the danger of a leak. "_
         | 
         | Very interesting. Did you find any noticeable difference
         | between the longevity of its heating as compared with water?
         | The reason I ask is that the specific heat of water is higher
         | than that of wheat so water should retain the heat longer.
         | 
         | BTW, I'm familiar with hot water bottles, they were all the
         | rage when I was a kid before electric blankets became
         | commonplace.
         | 
         |  _P.S.: I can 't say I ever had one leak but I reckon I'd have
         | come close. After some use, they'd start to perish around the
         | filling point/screw stopper. The idea was to always keep an eye
         | on it and once one noticed the first signs of perishing then
         | not to gamble too long before replacing it._
        
           | ColinWright wrote:
           | My impression is that they don't last as long, but definitely
           | for long enough. People think that if you need to heat them
           | more often then it's less efficient, but if the heat doesn't
           | last as long then almost certainly they take less energy to
           | heat up in the first place.
           | 
           | It's all about transferring energy/heat from one place to
           | another.
        
           | Cass wrote:
           | I've used a bunch of different pillows (cherry stone, wheat,
           | etc) and found that, while the initial heat is great and
           | feels better than a hot water bottle, they only stay properly
           | hot for about five to seven minutes. Once when I had a bad
           | back pain day, I put the microwave next to the bed so I could
           | keep a constant reheating cycle going.
        
             | SamBam wrote:
             | I agree. The buckwheat-filled pillows I got my kid stay
             | warm about 10-15 minutes tops, no matter how hot I get them
             | in the microwave.
        
         | groby_b wrote:
         | Bonus points, they're shaped like cute animals and super-fuzzy.
         | Harder to do with a water bottle. (There are covers, but who
         | wants a soppy teddy bear?)
        
           | AndrewOMartin wrote:
           | Negative points. I come home and think my flatmate has put a
           | puppy in the microwave.
        
         | Sparkle-san wrote:
         | I recently discovered Warmies[1] which is essentially this but
         | inside a stuffed animal and scented with lavender and I'm not
         | ashamed to admit that I'm low-key obsessed with them.
         | 
         | [1]https://warmies.com/
        
       | [deleted]
        
       | goda90 wrote:
       | My wife and I enjoy a rice filled sock. It has the added benefit
       | of being able to wrap around our shoulder/neck when needed. Might
       | be a bit harder to heat in a low-tech way than water though.
        
       | newsbinator wrote:
       | > The first "hot water bottles" - quite literally - were other
       | people and animals. Since time immemorial, people have warmed
       | themselves by huddling together.
       | 
       | Ha I never thought of it this way.
        
         | mc32 wrote:
         | 3-dog night. An expression inherited from shepherds and their
         | sheepdogs.
        
           | jstx1 wrote:
           | In case it's not clear - it means a night so cold that you
           | need 3 dogs in bed with you.
        
           | dreamcompiler wrote:
           | https://en.wikipedia.org/wiki/Three_Dog_Night#Name_origin
        
       | frankus wrote:
       | Water is a pretty amazing heat carrier. I did a bit of poking
       | around for a project idea and couldn't really find anything with
       | a higher heat capacity, at least for things that don't undergo a
       | phase change.
       | 
       | I wonder if there's a semi-low-tech way of taking advantage of a
       | phase change for extra capacity in something like a hot water
       | bottle.
        
         | masklinn wrote:
         | > Water is a pretty amazing heat carrier. I did a bit of poking
         | around for a project idea and couldn't really find anything
         | with a higher heat capacity, at least for things that don't
         | undergo a phase change.
         | 
         | Pretty much the only thing better would be ammonia, and it's
         | not necessarily as good for water bottles: it has a higher mass
         | heat capacity, but a lower volume heat capacity.
         | 
         | And of course you're dealing with a large volume of ammonia,
         | which is not exactly innocuous.
         | 
         | > I wonder if there's a semi-low-tech way of taking advantage
         | of a phase change for extra capacity in something like a hot
         | water bottle.
         | 
         | There are reusable handwarmers which do that, you heat them to
         | liquid, then phase-change them to solid. The advantage is
         | mostly that you can _trigger_ the release though, their heat
         | capacity is not amazing.
        
         | smeyer wrote:
         | People take advantage of phase changes as a way to store
         | thermal capacity frequently. Here[0] is one designed to keep
         | your coffee hot by using a material with a phase change
         | temperature similar to a temperature folks like to drink
         | coffee.
         | 
         | [0] https://www.joulies.com/
        
           | calvinmorrison wrote:
           | Tangentially related are "Boveda" packets which are the
           | opposite of silica packets for keeping food dry, they keep
           | your box perfectly humidified. For optimal cigar storage or
           | consumption - the humidity is a huge factor. Boveda packs are
           | sold by target humidity and are pretty awesome
           | 
           | (protip: you can reuse them by soaking them in distilled
           | water for a while after they dry up0
        
         | falcolas wrote:
         | People were recommending wax elsewhere, since its phase change
         | is above 20degC.
        
       | cheschire wrote:
       | We bought some after some of the recent winter related power
       | outages. Being able to capture gas-sourced heat (cooking water on
       | the stove) and then being able to transfer it somewhere else in
       | the house directly where we need it (under a blanket) is a killer
       | app.
        
       | madeofpalk wrote:
       | fyi, you can see the article also at
       | https://www.lowtechmagazine.com/2022/01/the-revenge-of-the-h...
       | which lacks the distracting background
        
       | fbanon wrote:
       | The high-tech equivalent is an Intel MacBook Pro in your lap,
       | running a clean build.
        
         | I_complete_me wrote:
         | Our main heat source as students was a HP 33S Scientific
         | Calculator; on really cold nights we input sqrt(-1).
        
         | meepmorp wrote:
         | Back in the day, I had a dual proc Athlon XP workstation that
         | also functioned as the main heating system for my apartment.
        
           | masklinn wrote:
           | With a P4 it'd have been a sauna instead.
           | 
           | In reality you'd need pretty low heating needs for that to
           | work, the bigger rigs would have a hard time reaching 1kW,
           | which is not even a portable heater.
        
       | gumby wrote:
       | For winter camping I use a Nalgene bottle full of boiling water,
       | which I toss into my sleeping bag to pre warm it.
       | 
       | Before sleeping I pull it out and give it to the dog who knows to
       | curl around it.
        
         | anon776 wrote:
         | I've read about a few cases where the nalgene pops/breaks and
         | leaves you with a wet sleeping bag. Which is one of my greatest
         | camping fears.
        
           | gumby wrote:
           | It's a legitimate fear as a wet sleeping bag could kill you
           | in the snow, but I've ever seen an actual Nalgene bottle fail
           | even when we tried driving a forklift and a bobcat over one.
           | I did crack one with liquid nitrogen but I don't camp at
           | those temperatures :-).
           | 
           | I've been given bottles made from other plastics but I've
           | always been dubious about them.
           | 
           | I have cracked the lids, but that takes a lot of work and an
           | aged lid. The lids are made of a different, softer material
           | which is more compliant to make a good seal. I do replace the
           | lids every few years.
           | 
           | Speaking of getting your gear soaked (not): a good habit in
           | the snow is to put a nalgene of water upside down into the
           | leg of each boot overnight to keep them from freezing. I
           | guess you'd be concerned about that too.
        
           | mleonhard wrote:
           | This happens when the air in the bottle warms up and
           | increases pressure which tries to expand the bottle. To
           | prevent this, fill the bottle with hot water, close it, shake
           | it for a moment to let the air mix with the hot water and
           | warm up, then open it just enough to equalize the air
           | pressure, and close it tightly. As the bottle cools, its
           | internal pressure goes down. External air pressure will try
           | to crush the bottle. External pressure is less likely to
           | damage the bottle than internal pressure.
        
       | draw_down wrote:
        
       | danw1979 wrote:
       | Even more efficient, but not portable, are electric heat mats.
       | I've had one under my desk this winter and between that and a
       | couple of jumpers, I've not felt the need to have the heating on
       | in my northern UK based home office.
        
         | skyfaller wrote:
         | Low-tech Mag wrote a little about heated clothes:
         | https://solar.lowtechmagazine.com/2013/11/heat-your-clothes-...
         | 
         | That article is a little silly because it's talking about
         | heated clothes only making sense indoors (from an energy saving
         | perspective), since it can allow you to use less energy heating
         | your home. If you are sitting around in your house, electric
         | heating pads or blankets probably make more sense than plugging
         | your clothing into the wall, especially since plug-in clothes
         | don't really exist, but heating pads / blankets do.
        
         | germinalphrase wrote:
         | An electric mattress pad is a definite modern luxury up here in
         | Minnesota. Snap it on an hour or two before bed. Toasty warm
         | sheets and blankets.
        
         | zemvpferreira wrote:
         | An electric blanket in every bed has been my only winter must-
         | have since I turned 30. I never turn on heat and I walk around
         | in shirt sleeves all winter, but getting into a cold bed is
         | torture (especially since I sleep naked with only one blanket).
         | 
         | It's the most comfortable thing I've ever experienced and I've
         | converted 10s of people to my religion. Electric blankets in
         | every bed!
        
           | DenisM wrote:
           | Are you not worried about electric shock? Blankets get worn
           | out over time, and then there is possible liquid damage...
           | 
           | I'd love me a <36v blanket but 110v or even 220v gives me the
           | willies.
        
           | dsr_ wrote:
           | Your profile says that you live in Lisbon.
           | 
           | Lisbon's average January low: 47F = 8.3C
           | 
           | Boston's average January low: 23F = -5C
        
             | mcguire wrote:
             | From the article:
             | 
             | " _Because I don't have the time nor the budget to send hot
             | water bottles to everyone, I have written this article.
             | It's largely based on my personal experience - I have been
             | using hot water bottles for many years and they are the
             | only heat source in my apartment._ "
             | 
             | But then, " _Low-tech Magazine is written by Kris De Decker
             | (Barcelona, Spain)._ "
             | 
             | Barcelona's average low in February is 47F, too.
             | 
             | It's currently 32F (0C) here in lovely northern Alabama.
        
             | soperj wrote:
             | Edmonton average January low: -15C
             | 
             | And there are people that go around in shorts in the winter
             | there too. What's the point of this?
        
               | zemvpferreira wrote:
               | I'm not sure either. To clarify I was merely trying to
               | illustrate that I am not a cold person and I still love
               | love love my electric bed warmers. There's something
               | magical about going from a cold room into a really warm
               | bed and I'll never sleep another winter without one if I
               | can help it.
        
               | dsr_ wrote:
               | The point is that in Lisbon, perhaps it's reasonable to
               | shut off your heating and use hot water bottles. That's a
               | route to suicide in Boston or Edmonton.
        
               | soperj wrote:
               | If you didn't freeze to death, your pipes would
               | definitely freeze without any heat whatsoever.
        
         | GordonS wrote:
         | My home office here in NE Scotland is a converted garage, which
         | despite being converted "properly" and having a radiator, is
         | always cold (as low as 14C). The heat mat sounds interesting,
         | but I when I googled only underfloor heating stuff came up -
         | any chance you could point me towards a link please?
        
           | ianmcgowan wrote:
           | At least in the US, a google/amazon search for
           | electric+foot+warmer comes up with some good options. My feet
           | are in one right now!
           | 
           | https://www.google.com/search?q=electric+foot+warmer
        
           | tonyedgecombe wrote:
           | Perhaps something like this under your feet:
           | 
           | https://www.amazon.co.uk/Waterproof-Electric-Temperature-
           | Adj...
        
           | post_break wrote:
           | Maybe he's talking about an electric blanket. Or you can use
           | an electric heat pad for sore muscles. Just turn it on and
           | put your feet on it.
        
       | parenthesis wrote:
       | As a child, we had an electric kettle on the upstairs landing
       | specifically for hot water bottles. Not being next to a sink,
       | we'd simply empty the water from the cold hot water bottle back
       | into the kettle.
        
       | elric wrote:
       | I use my laptop's power brick as a foot warmer. Works remarkably
       | well in winter, and it's a great use for what is otherwise waste
       | heat.
        
       | Pompidou wrote:
       | Hot water bottle. In french we have a specific name for this tool
       | : "bouillotte", from verb "bouillir" (boiling) and sufix "otte"
       | (diminutive). Everybody in my familly use it. My ex wife was
       | litteraly addicted to it.
        
       | djhworld wrote:
       | Really appreciate my hot water bottle in the winter, pop it in
       | the bed 5-10 minutes before climbing in and it's wonderful.
       | 
       | Oddly I also like a really cold bedroom, I have the window open a
       | bit mostly all year round.
        
       | throwaway946513 wrote:
       | While the submitted link is wholly appropriate and I take no
       | issues with it - I much prefer and enjoy reading Low Tech
       | Magazine from their solar subdomain.
       | https://solar.lowtechmagazine.com/2022/01/the-revenge-of-the...
        
       | leecarraher wrote:
       | was kind of hoping for a more analytical take, comparing their
       | efficiency to the newish slate of battery powered personal
       | heaters, or older iron-oxide single use heaters. My guess is the
       | newer electronic devices allow for more consistent heat, but at a
       | much higher entry cost, and less flexible charging. I wonder if
       | an mechanically adjustable thermal barrier could be employed in a
       | hot water device, that could provide a more consistent heating
       | experience.
        
       | rdtwo wrote:
       | Anyone use an inconspicuous one to keep warm in the office while
       | working? What does it look like?
        
         | fredley wrote:
         | If I'm cold at work I just zip one up inside my hoodie.
        
       | kipchak wrote:
       | Hot water bottles or heat bags are nice for keeping limbs warm
       | also, especially if you don't have great circulation. heavyweight
       | base Layers and hot tea do a great job keeping your core
       | temperature up, but you have to get creative keeping uncovered
       | fingers warm while typing.
        
       | shimonabi wrote:
       | I just remembered I inherited a "termofor" from my grandmother.
       | 
       | It's filled now with hot water after 7 years.
        
       | infologics wrote:
        
       | danka wrote:
       | Mobile-friendly URL - https://outline.com/XFtrM5
        
       | stakkur wrote:
       | Last year, when we were without electricity for a week, we used
       | hot water bottles to heat the beds and generally for warmth and
       | comfort. They're cheap, stay warm for _hours_ , and have many
       | uses. I recommend getting several for your home 'emergency' kit.
        
       | 2Gkashmiri wrote:
       | i use it daily. heck, for a family of 3 we have 5 in circulation
       | for today. i find hat a tad bit excessive but coughing in the
       | home has caught up so its fine. we usually buy every year for
       | winter for like inr ~160-300 or $ 3-4. lasts the winter season
       | and shitty products leak in the bed, either causing you a burnt
       | leg in the morning or a dripping bed. all in all, a good thing.
        
       | pierrebai wrote:
       | I personally use a bean bag. I put it 2 minutes in the microwave.
       | Seems simpler than heating water.
        
       | bradly wrote:
       | dang: can you close/merge this with
       | https://news.ycombinator.com/item?id=30024127 ? They are both on
       | the home page currently
        
       | tppiotrowski wrote:
       | I remember a story from college in early 2000's. The university
       | was trying to cut energy use by 20% by 2020. The professor asked
       | how much power would be saved if we turned off every light,
       | computer and unplugged all other electronics: 12%.
       | 
       | This was an eye opening moment. LED's are great but if you really
       | want to make a dent in energy usage of buildings it's heating and
       | ventilation. Why can't we live in a world where everyone wears
       | heated clothes and we just leave the windows open (even in
       | winter)?
       | 
       | Seems like heating a person is much more efficient than heating
       | an entire house, in which we never occupy more than 1% of the
       | available floor space at any one time...
        
         | qwertox wrote:
         | > ventilation. Why can't we live in a world where everyone
         | wears heated clothes and we just leave the windows open (even
         | in winter)?
         | 
         | Sounds pretty radical, but if you think about it, it sounds
         | interesting. Specially now with the pandemic. In the first
         | months our schools in Germany were forced to leave their
         | windows open, even in the winter. I don't know how long they
         | did this, but it must have been hard for them.
         | 
         | If everybody had such heated clothing, this sounds like an
         | interesting idea, including in the context you're putting it
         | in.
         | 
         | Then again, buildings need to be kept warm so that the humidity
         | doesn't cause mold.
        
         | jimmaswell wrote:
         | Because the tradeoff of energy usage is worth the improvement
         | to quality of life.
        
           | tppiotrowski wrote:
           | Anecdotally, I hear at least a few friends each year
           | complaining about the cost of heat during winter.
        
             | mcguire wrote:
             | Complaining, but not doing anything about it?
        
         | inglor_cz wrote:
         | I knew a family that struggled to pay their bills and in
         | attempt to get even they reduced their inner home temperature
         | to 13 degrees Celsius (about 55 F).
         | 
         | They were constantly miserable, because their hands, nose etc.
         | were cold. You cannot really perform most of your home
         | activities with gloves on.
         | 
         | Plus, the lady suffered from incessant UTIs.
        
           | qwertox wrote:
           | This winter I waited a lot with starting to heat, so I kept
           | the place at around 16degC. Then when the first sub-zero days
           | came I put it on, but I lowered the temperature of the
           | thermostats by 1 degree compared to last year. It's
           | absolutely ok. Maybe it's good to do such a test for a while
           | to see how you can adapt to it.
        
           | masklinn wrote:
           | I've got friends who live at 15C or so in winter.
           | 
           | You need good clothing, but also a certain constitution which
           | does not eagerly pull blood from your extremities. A beard
           | probably helps as well.
        
         | whtrbt wrote:
         | We use a kotatsu [0] for this - a table with a heating element
         | underneath and a thick quilted 'tablecloth'. I'm in Melbourne,
         | so the lowest it gets is a few degrees above 0C, but we _never_
         | use air con/heating. Summer we close the blinds in the day,
         | open blinds and windows up at night.
         | 
         | It's not fair to expect that approach to work for everyone
         | everywhere, but there are plenty that could do this instead of
         | wasting so much energy on creating a homogenous environment
         | year round.
         | 
         | [0] https://en.wikipedia.org/wiki/Kotatsu
        
           | baud147258 wrote:
           | > that could do this instead of wasting so much energy on
           | creating a homogenous environment year round.
           | 
           | The worse is when the office aircons are set so low that you
           | catch a cold in the middle of the summer heatwave...
        
             | ryanianian wrote:
             | Cold temperatures do not make infectious diseases like
             | colds more transmissible.
        
           | almog wrote:
           | I've been thinking about converting my work desk to a Kotatsu
           | in the winter based on an Arduino project I've found sometime
           | ago. At the moment though I'm using an infrared incandescent
           | bulb mounted just above my keyboard + a floor heating sheet
           | mounted to a piece of plywood for my feet.
           | 
           | btw, the Arduino project is this one:
           | https://create.arduino.cc/projecthub/simp-team/how-to-
           | make-a...
        
             | ryanianian wrote:
             | I keep my wfh office around 70f but my desk is right by a
             | huge window, so my hands get very cold when it's freezing
             | outside, making typing and desk-work annoying.
             | 
             | I got a little heated desk/writing pad online, and it is
             | amazing.
             | 
             | With it turned to high it becomes almost too warm to touch.
             | The mouse and keyboard heat comfortably. After a couple
             | hours I can reduce the room temp a few degrees and still
             | feel rather comfortable.
        
         | decafninja wrote:
         | My wife and I live in the same condo I used to live in as a
         | bachelor. My frugal single self saw the electric bill for
         | heating and AC around $50/month. I would only use the heating
         | or AC for an hour or two when I got back from work, which would
         | be enough to heat or cool the apartment until morning.
         | 
         | After we got married and my wife moved in, we use the heat a
         | lot, lot more since she can't stand the cold (she's fine
         | without the AC - even more so than me). The electric bill
         | during the peak winter months easily balloons to $300-400 now.
        
           | Tronno wrote:
           | $300-400 could be the electric bill for a large house (in
           | winter). If this is what you're spending to heat a small
           | apartment, something may be wrong with your building.
        
         | 99_00 wrote:
         | >Seems like heating a person is much more efficient than
         | heating an entire house
         | 
         | Frozen pipes, and possibly other issues I'm not thinking of.
         | 
         | No need to go to extremes. Turn down the heat during the day
         | and wear a sweater. People have to spend time outside anyway so
         | they should already dress warm.
         | 
         | At night turn off the heat or down significantly more. Have
         | warm comforter. Set the timer to turn the heat on before you
         | wake up.
        
         | falcolas wrote:
         | > just leave the windows open (even in winter)?
         | 
         | Because even with heated clothes, you can get frostbite on
         | exposed skin. Not to mention frozen water pipes, the effective
         | inability to remove clothes to clean yourself, and technology
         | stops working when it gets too cold.
         | 
         | Even igloos are at or above freezing on the inside.
        
           | fulafel wrote:
           | You don't get frostbite sleeping in tent in the winter with
           | suitable bedding or sleeping bag, so it shouldn't be a
           | problem in a building. Changing clothes and cleaning in
           | winter camping works out as well.
        
             | GavinMcG wrote:
             | The response was about leaving the windows open. Do you
             | leave the door of your tent open when you winter camp?
        
       | giantg2 wrote:
       | Hot snapz makes hand warmers and larger sizes that are
       | rechargeable by boiling in water. Interesting stuff.
        
       | Accacin wrote:
       | Didn't realise they weren't so popular, I know a lot of people
       | who use them here. Lovely in bed!
        
       | [deleted]
        
       | vardagsnytt wrote:
        
       | ricardobayes wrote:
       | Hah, so nice. It was just earlier today we discussed our newfound
       | love for this little device in my family.
        
       | lowbloodsugar wrote:
       | in Scotland, it's not a "foot warmer". it's a piggy.
        
       | zwieback wrote:
       | We have four of them at our house and one at our weekend place.
       | And this is in Western Oregon where it doesn't really get cold.
        
       | kbos87 wrote:
       | It's a pretty common winter camping trick to fill a water bottle
       | with boiling water, put a sock over it, and put in your sleeping
       | bag while you sleep. Works extremely well!
        
         | Lio wrote:
         | I just replied the same thing. It's an excellent hack.
         | 
         | Was going to add a warning not to drink the water from plastic
         | bottles though due to plasticisers.
         | 
         | Unlined Ti metal bottles should be fine though.
        
           | mprovost wrote:
           | Modern Nalgenes are BPA free and don't contain plasticisers.
        
           | blacksmith_tb wrote:
           | I'd say that argues for using the ol' Nalgene etc. only as a
           | foot-warmer, and drinking out of the metal bottle?
        
             | Lio wrote:
             | Ideally yes but it's really hard to find fully metal
             | driking bottles.
             | 
             | If you buy something like a Sigg aluminium bottle or no-
             | name copy it will be lined with some kind of plastic.
             | 
             | If you use a light weight drinking bladder that will be
             | plastic too. I've read that risk is much higher if you
             | apply heat to a plastic container. This is why you should
             | avoid microwaving in plastic containers.
             | 
             | So that leaves you either only using a cold liquids in
             | plastic and accepting some risk or buying expensive (and
             | relatively heavy) titanium drinking bottles.
        
               | rkk3 wrote:
               | > Ideally yes but it's really hard to find fully metal
               | driking bottles.
               | 
               | Klean Kanteen?
        
               | mprovost wrote:
               | Using an insulated bottle kind of defeats the purpose
               | which is to transfer heat from the water to yourself.
               | You'll wake up in the morning with a bottle full of hot
               | water but you'll still be cold.
        
               | Lio wrote:
               | Just looked them up. Looks really nice.
               | 
               | Maybe a bit heavy for me when hiking but really nice for
               | day to day stuff.
               | 
               | I like the Vargo stuff. Also the new Keego flexible
               | bottles look really interesting.
        
       | bitxbitxbitcoin wrote:
       | Spent the summer with the Nevada Conservation Corp doing trail
       | and restoration work a week at a time.
       | 
       | Hot Nalgenes are indeed still all the rage for keeping warm in
       | your sleeping bag at night.
        
         | anarazel wrote:
         | Just don't forget to budget for the increased fuel consumption
         | for heating that water :). No experience around that,
         | personally, ahem.
        
       | jgrahamc wrote:
       | Maybe it's because I am British but hot water bottles have been
       | something I've owned and used forever. They just exist as a thing
       | you use. To warm the bed, or your feet, or your back. Given that
       | the British also have electric kettles for warming water they are
       | simple to use.
       | 
       | I did try to buy one here in Portugal and I was sent to the
       | pharmacy where they had a tiny little one that you might use for
       | pain relief.
        
         | kranner wrote:
         | They're common in India as well. My dad uses one every day in
         | the (North Indian) winters.
        
         | chrisseaton wrote:
         | In my British household we call the cylinder foot warmer ones
         | 'mother cats'.
        
           | masklinn wrote:
           | What is the "proper" name for these? Last time I looked for
           | foot warmers all I got was electric bootstie things, or
           | hotplates for foot. So I got a small radiant heater instead.
           | 
           | Though I guess a microwavable grain bag on a normal footrest
           | would also work.
        
             | Someone wrote:
             | Wikipedia (https://en.wikipedia.org/wiki/Foot_stove) says
             | its restricted to wooden ones with hot charcoal, but I
             | would call them "Foot Stove" regardless of construction
             | material or heat source.
        
               | thom wrote:
               | Never seen one of these, but my dad used to have charcoal
               | hand warmers similar to this:
               | 
               | https://www.amazon.co.uk/Pocket-Hand-warmer-charcoal-
               | includi...
               | 
               | We used to take them to football matches but eventually
               | they became the sort of thing they'd confiscate cos fire
               | and idiots don't mix.
        
         | mattl wrote:
         | Yeah, British expat now American here... I buy people kettles
         | and hot water bottles if I'm going to be at their home for any
         | extended amount of time. Also a toaster.
        
           | Turing_Machine wrote:
           | As I understand it, electric kettles never became as popular
           | in the United States (though of course they do exist) because
           | the electrical standards here mean that it's infeasible to
           | make one that works really well -- a British electric kettle
           | might be rated at 3,000 W (about 13 A at 230 V), but a
           | standard U.S. convenience outlet can only provide about 1,800
           | W (15 A, 120 V). Even the higher-rated 20 amp outlets are
           | only going to get you 2,400 watts. To get 3,000 watts, you'd
           | either need a special circuit (like the ones for RV hookups),
           | or plug it into a dryer or electric range outlet.
        
             | lewsid wrote:
             | I live in the US and have an electric kettle. I was made
             | aware of their existence in my travels abroad. It was a
             | game-changer. Even with our electrical standards my kettle
             | can get to boiling in a mere minute or two.
        
             | ssully wrote:
             | I just assumed they never took off here because tea isn't
             | as popular in America. The only people I know who own
             | kettles in America are people who regularly drink tea,
             | including myself.
        
               | txg wrote:
               | I drink both, but now use my kettle almost exclusively
               | for the awful indulgence of pre-mug warming before
               | dropping in the espresso from my stove-top pot.
        
               | [deleted]
        
               | wtetzner wrote:
               | I also use mine to make coffee (via a French press).
        
               | time_to_smile wrote:
               | Or pourover coffee which, at least anecdotally, I've seen
               | become much more popular over the years.
        
             | vel0city wrote:
             | I dunno, tons of people I know in the US have electric
             | kettles. Its not like its incredibly painful to use them,
             | and they'll still usually beat out using the microwave to
             | heat water quickly, but only slightly. While it is about
             | half as much power than most of Europe, its still only a
             | few minutes to go from tap water to boiling. It is not like
             | we're talking hours to get it to boil.
             | 
             | From my experience one of the biggest reasons why people
             | don't have an electric kettle is because they often don't
             | think they have a use for them. Tons of people in the US
             | would really only use it for making coffee, of which drip
             | coffee makers were incredibly popular for a long time. So
             | needing fast hot water is somewhat rare, and usually when
             | its needed in regards to cooking you can just measure your
             | water in a measuring cup and microwave it for a couple of
             | minutes which is just about as fast.
             | 
             | The people I know who actually use electric kettles in the
             | US are:
             | 
             | * Those who brew a lot of tea (far less common in US than
             | globally)
             | 
             | * Those who often do alternative coffee brewing methods
             | (pour over, french press, aeropress, etc)
             | 
             | * Those who make a lot of ramen or other instant noodles
             | and have limited kitchen spaces (college students)
        
             | 0xbadcafebee wrote:
             | Our electric kettles work just fine on 110VAC. We're just
             | isolated from the rest of the world so external cultural
             | changes don't take hold. We still use Imperial measurements
             | and serve half-pints of beer. Same reason Japan has an
             | "old" World Wide Web; it works fine for them, and their
             | culture doesn't change easily.
        
               | Turing_Machine wrote:
               | It depends on whether taking more than twice as long to
               | heat the water is "just fine" for your use case.
               | 
               | Me, I use the high output burner on the gas range and a
               | traditional kettle.
               | 
               | Note that other European and Asian kitchen gadgets have
               | had no trouble making inroads in the United States. While
               | some people obviously do have electric kettles here,
               | they're far, far from being the ubiquitous thing they are
               | in British kitchens.
        
             | js2 wrote:
             | I bought an electric kettle[1] a decade ago shortly after I
             | switched to an Aeropress for coffee. I now drink green tea
             | a couple times a day in addition to my morning coffee. I
             | think most Americans just don't have much cause to heat
             | water for anything except coffee, and they use a coffee
             | maker for that.
             | 
             | My kettle is 1500 watts and I just timed it. Heating a bit
             | over 1L (~36 oz) of water from 68degF (20degC) to 200degF
             | (93degC) took 4:20.
             | 
             | It's one of those things where the first time you use it,
             | you can't imagine ever not having one, assuming you have
             | cause to heat water on a regular basis.
             | 
             | Still don't own a toaster though. A toaster oven does fine
             | with toast and can be used for a lot more besides.
             | 
             | Don't own a rice maker either. That's been an ongoing
             | negotiation with my wife for 25 years now. :-)
             | 
             | [1] https://www.amazon.com/Cuisinart-
             | CPK-17-PerfecTemp-1-7-Liter...
        
               | vel0city wrote:
               | I have a basic rice cooker and I absolutely love it.
               | Perfect rice every time without having to think too hard
               | about measurements or the time, as the measurements are
               | stamped on the bowl (fill rice here, fill water here) and
               | it will always switch to warming mode at exactly the
               | right time. I wouldn't bother getting a fancy
               | computerized model, the old thermostatic ones are pretty
               | much perfect.
               | 
               | Technology Connections video on old-style rice cookers:
               | https://www.youtube.com/watch?v=RSTNhvDGbYI
               | 
               | We have that exact same kettle, its wonderful.
        
               | greenonions wrote:
               | My wife convinced me to buy what I would consider an
               | expensive rice cooker, computerized. Now the rice is
               | fantastic, I'll admit. However, I'm not really convinced
               | that it's worth 6x a basic rice cooker.
        
             | etblg wrote:
             | Electric kettles are very common in Canada and we have the
             | same power systems as the USA. I've never found that the
             | electric kettles here are painfully slow or anything, it's
             | just a culture thing on who wants boiling water on demand
             | more I guess.
        
               | ska wrote:
               | > I've never found that the electric kettles here are
               | painfully slow or anything,
               | 
               | You probably would if you were used to UK kettles...
        
               | etblg wrote:
               | I guess, but my kettle finishes boiling right as I finish
               | hand-grinding my coffee beans, so I can't say it's been a
               | big issue in my life.
        
             | hadlock wrote:
             | Electric kettles are finally starting to get traction here,
             | we use ours for tea and instant coffee, and pre-boiling
             | water for making noodles on the stove since it's so much
             | more efficient.
        
             | txg wrote:
             | On my twelfth year of North-American kettle operation I've
             | gotten past the tedium of waiting extra minutes for the
             | water to boil.
             | 
             | Visiting my family, however, I now have to flick the switch
             | on twice - autopilot usually means the water has cooled
             | below the supposed optimal infusion temperature by the time
             | I return to the kitchen.
        
             | extrapickles wrote:
             | Unless you are in an apartment/condo in the US (which can
             | have 208V), you likely have 240V power in your house. I
             | have a 240V 15A outlet in my kitchen so I can use a British
             | kettle with a swapped plug. It would be nice if it was
             | standard to have 240V outlets in US kitchens.
             | 
             | Note: If you are wanting to do this yourself, if you get
             | one with any electronics in it (even an led power light),
             | you should modify the capacitive dropper power supply for
             | the electronics to operate on 60hz. For a well designed
             | circuit, forgetting to do so means a resistor/zenier will
             | be running hotter, for a very cheap circuit it can let
             | magic smoke out.
        
             | bryanlarsen wrote:
             | 15A outlets are only rated that for instantaneous current.
             | For continuous current, appliances are only allowed to pull
             | 80%. So kettles in the US are 1400W, half that of British
             | kettles.
             | 
             | Like many modern kitchens, I have 20A outlets. Current code
             | says that you either have to have 20A circuits in the
             | kitchen or split 15A circuits. What the electrician chooses
             | to install depends on whether 14/3 or 12/2 wire is cheaper
             | that day.
             | 
             | One of my pet peeves is that I can't buy a 20A 1900W
             | kettle. There has to be enough market demand for one? Put a
             | big picture of a NEMA 5-20 outlet on the front so that
             | fewer people get confused.
        
               | nums wrote:
               | 14/2 or 12/2 :-)
        
               | bhandziuk wrote:
               | 14/3 was right. They were trying to describe a MWBC.
               | Though you can have 20 A MWBCs too (12/3)
        
             | elliottkember wrote:
             | I recently bought a Zojirushi water boiler. Instant hot
             | water all day. Never going back to a kettle.
        
           | 7thaccount wrote:
           | I normally just throw on a blanket or turn up the thermostat,
           | but I know you normally don't adjust the thermostat at
           | someone else's house.
        
             | Jill_the_Pill wrote:
             | I think the idea of the article is, in part, that heating
             | people is more efficient/economical than heating space.
        
               | 7thaccount wrote:
               | Fair enough. I mean I guess these methods were pretty
               | effective for centuries where people somehow didn't
               | freeze to death.
        
           | djrogers wrote:
           | > Also a toaster
           | 
           | Err, wha? I don't know anyone here without a toaster - or
           | 2...
        
             | _jal wrote:
             | I've never owned one. I very occasionally toast bread in
             | the broiler.
        
             | mattl wrote:
             | A lot of people use a toaster oven to make toast, it seems.
        
               | Cupertino95014 wrote:
               | Indeed, and you can toast odd-shaped "breads" that won't
               | go down a toaster slot.
        
               | function_seven wrote:
               | What's the difference between a pop up slice toaster (I
               | assume that's what you're talking about) versus a toaster
               | oven?
               | 
               | I grew up with the first kind, but now only use the
               | second kind to reduce clutter on my countertop. I never
               | detected a difference in the two methods, but I'm also
               | not very observant!
        
               | mattl wrote:
               | It might be a cultural thing but a slice toaster is way
               | more of a set and forget operation, which I like... also,
               | a toaster gets based used for one thing and a toaster
               | oven is used for a lot of other foods, and I have to
               | worry about cross contamination.
        
               | function_seven wrote:
               | Oh that makes sense. I use mine 80% for toast and the
               | remaining use is usually bread-adjacent things.
               | 
               | If I was also using it to heat up chicken tikka masala or
               | something, then that would probably not be good.
        
               | jayd16 wrote:
               | I can melt cheese over bread or bagel in a toaster oven.
        
               | function_seven wrote:
               | Yeah, that's one thing I discovered when I stopped using
               | a slice toaster. I can put a cold pat of butter on the
               | bread about halfway through the toasting process, and
               | avoid the trauma of trying to spread cold butter on the
               | toast.
        
               | burkaman wrote:
               | Toaster oven should be a lot less efficient and slower
               | because it's heating up a larger space, but the result
               | should be the same.
        
               | r00fus wrote:
               | I do this mostly because I buy loafs of ciabatta or
               | baguette, cut and freeze them.
               | 
               | Trying to get those odd/thick shapes after freezing into
               | a slice toaster was challenging, and we already had a
               | toaster oven so I never replaced my slice toaster when it
               | died.
        
             | jimmaswell wrote:
             | Highly recommended toaster:
             | http://automaticbeyondbelief.org/
        
               | lolinder wrote:
               | Seconded on the Sunbeam! We inherited my father-in-law's
               | when he moved across the country. He inherited it from
               | _his_ parents.
               | 
               | It's been in constant use for at least 60 years (I'm not
               | sure when his parents got it), and is now making perfect
               | toast for a fourth generation.
        
               | javajosh wrote:
               | I prefer toaster ovens because _cookies_. You can make
               | cookie dough and make one or two cookies at a time,
               | ensuring they are always fresh out of the oven.
        
               | rurp wrote:
               | Wow that's a great idea! It's one of the pieces of advice
               | that seems obvious once I hear it but I never would have
               | thought of it myself.
        
             | chrisseaton wrote:
             | People tell Americans rarely put butter on bread in
             | sandwiches, so what do you put on your toast?
        
               | jayd16 wrote:
               | We put mayonnaise on sandwiches instead but we use butter
               | for toast.
        
               | wtetzner wrote:
               | Interesting. I always butter my bread. Sometimes I'll
               | also put other stuff on it, but always butter first.
        
               | Turing_Machine wrote:
               | Toast is usually buttered, but it's not considered to be
               | a sandwich in and of itself in the United States.
               | 
               | Now, a sandwich can be made with toasted bread,
               | certainly, but in that role it's normally slathered with
               | mayonnaise, mustard, or something of that nature rather
               | than being buttered.
               | 
               | Exception: grilled cheese sandwiches are often buttered,
               | though with those they typically have the butter on the
               | outside. On the inside is either nothing or (my
               | preference) mayonnaise.
        
               | derefr wrote:
               | One of those "chef lifehacks" that stuck with me is that
               | you can use mayo in place of butter on the outside of a
               | grilled cheese. Easier to spread, browns perfectly, and
               | turns out to taste exactly the same. (Which is
               | surprising, given that every time I've made a grilled
               | cheese with any kind of oil in place of the butter, it's
               | turned out disgusting. Emulsifying the oil fixes the
               | problem somehow.)
        
               | lief79 wrote:
               | Hmmm, I've made a great one with olive oil and sun dried
               | tomato bread.
               | 
               | I suspect it depends on the ingredients ... you need a
               | bread that goes well with the oil and have to be very
               | careful on not oversoaking it.
        
               | ketzo wrote:
               | Was just about to comment the same thing. Massive upgrade
               | in grilled cheese quality.
               | 
               | If you can get it, Duke's Mayo is just absolutely
               | bonkers. I also really like the Trader Joe's organic
               | mayo.
               | 
               | Also, since I'm deeply invested in grilled cheeses, more
               | recommendations:
               | 
               | I use a ratio of 1 part gruyere, 1 part sharp or extra-
               | sharp cheddar. I also really like a little parmesan or
               | pecorino, but it tastes less "classic grilled cheese," so
               | might not be for everyone.
               | 
               | Cooking method:
               | 
               | - heat pan to medium
               | 
               | - put mayo on one side of two pieces of bread
               | 
               | - put the first piece of bread into the pan, mayo side
               | down (it should sizzle lightly)
               | 
               | - heap your cheese on top of this piece, and press it
               | down onto the bread a little
               | 
               | - after 2 minutes, take the other piece of bread and put
               | it mayo side _up_ onto the top of the cheese. flip the
               | sandwich (so that the fresh mayo is now down).
               | 
               | - 2 more minutes and you're good to go. serve with tomato
               | soup (naturally) and a little ranch if you're a
               | degenerate like me.
        
               | Kluny wrote:
               | When I moved in with my partner, she came with a small
               | George Foreman grill. She used it occasionally for
               | reheating burritos, but together we found out that it
               | makes grilled cheese so quickly and easily, that grilled
               | cheese went from being an occasional treat to a weekly
               | staple. I highly recommend it over the pan option.
        
               | Turing_Machine wrote:
               | In my opinion, the Foreman grill is one of the rare
               | massively-hyped kitchen gadgets that's actually useful
               | enough to be worth the cabinet space in the long term.
        
               | satsuma wrote:
               | i should really bust mine out more. i've had one for ages
               | and used it a bunch in college then just... stopped.
        
               | _whiteCaps_ wrote:
               | Have you tried making garlic bread with mayo? Yum!
        
               | ska wrote:
               | if you are going that direction, why not garlic aoli?
        
               | panzagl wrote:
               | I'm just here to make sure no one accidentally confuses a
               | grilled cheese with a melt.
        
               | js2 wrote:
               | Behold, the field guide to the American Sandwich:
               | 
               | https://www.nytimes.com/interactive/2015/04/14/dining/fie
               | ld-...
               | 
               | If there's one food America knows how to do in many
               | variations, all delicious to varying degrees, it's the
               | sandwich.
        
               | learc83 wrote:
               | Butter or jam/jelly.
        
               | samwillis wrote:
               | Maybe not what you put on the toast but where you put it.
               | What about a Toast Sandwich, a slice of toast between two
               | slices of bread...
               | 
               | https://en.m.wikipedia.org/wiki/Toast_sandwich
        
           | sockpuppet69 wrote:
        
         | time_to_smile wrote:
         | As an American I've been shocked how they've basically
         | disappeared. Hot water bottles used to be a staple of American
         | household. While they are easy to find on Amazon, they don't
         | seem to be as ubiquitous as they once were.
        
         | hotpotamus wrote:
         | I've never put much thought into this but my mother who spent
         | some of her teenage years in the UK in the 70's used to use a
         | hot water bottle. Here in the US, we had a mid-century ideal of
         | "energy too cheap to meter" that would have been provided by
         | the burgeoning nuclear industry. It never really panned out,
         | but a lot of houses had things like radiant heaters in floors
         | and room wrapping baseboard heaters installed for comfort which
         | is nicer than having to deal with a fluid filled bladder, but
         | obviously much more costly.
        
         | soperj wrote:
         | I didn't think you were supposed to put boiling water in a hot
         | water bottle? at least the rubber ones...
        
           | [deleted]
        
           | blacksmith_tb wrote:
           | I do see that there are silicone ones available, those should
           | take boiling water in stride (though you'd need to wrap them
           | in a thicker cover to avoid boiling yourself...)
        
           | thrwy_ywrht wrote:
           | Every hot water bottle tells you not to use boiling water in
           | it, but at the same time everyone I know who regularly uses
           | hot water bottles uses boiling water from an electric kettle.
        
           | jimnotgym wrote:
           | ...but everyone does. I just let it go off the boil and then
           | use it.
        
         | vanderZwan wrote:
         | > _Maybe it 's because I am British_
         | 
         | Nah, they're also not uncommon in the Netherlands, where I'm
         | from, and Germany, where my partner's from (don't know if I'd
         | call them "common" though).
         | 
         | What I found truly surprising is that they're impossible to
         | find in Sweden, where we live. You'd think that hot water
         | bottles would become more common the further up north you go.
        
         | tsupiroti wrote:
         | Hot water bottles are quite common in Portugal. You should be
         | able to find one at any large supermarket (e.g. Continente).
        
           | juanuicich wrote:
           | I can confirm Continente stocks them in all branches I've
           | been to, but only at the beginning of winter. By late January
           | they're hard to find already.
        
       | JoeAltmaier wrote:
       | Scouts used to heat a rock in the fire, put it in a bag and take
       | it to their tent.
        
         | downrightmike wrote:
         | not too hot, nor wet rocks, those explode
        
       | danans wrote:
       | Who remembers waterbeds from the 1980s? Basically a big water
       | bottle (some had heaters too). I assume they were uncomfortable
       | as heck to sleep on, but as a kid they were sure fun to play on
       | until you got reprimanded.
        
         | aidenn0 wrote:
         | The ones with internal baffles to prevent sea-sickness are
         | still generally liked by people who try them. However, they are
         | extremely heavy and if they leak are a potential source of
         | significant damage (many apartment and condo complexes have a
         | "no water bed" policy for this reason).
         | 
         | I'm not sure, but I think that most (if not all) of them had
         | heaters because water can pull an awful lot of heat from your
         | body over the course of 8 hours even if it's quite warm (if
         | it's under 95F or so, you can cool off quite fast by sleeping
         | on a bare waterbed mattress; a bare waterbed mattress under 80F
         | can put you at risk of hypothermia).
         | 
         | That being said, the mattresses had insulating covers so it's
         | possible there were some where heaters were not needed.
        
         | mikecoles wrote:
         | I bought one in the late 1990s. I needed a bed and found
         | waterbed mattresses were cheap, actually they were all the same
         | cost from single to CA king. I ordered the king size because
         | why not and went to building the frame while waiting for the
         | mattress arrival. I only had 1' left around two sides of the
         | bed in my bedroom after setting it up, but it was the most
         | comfortable sleep. I think the "waveless" feature was a big
         | benefit. It did take a few days to get used. I now sleep on a
         | high end pillow top bed. It's nice, but is second to the
         | waterbed.
        
         | kwhitefoot wrote:
         | I've only tied a water bed once; it was very comfortable.
         | 
         | It had damping inside so it didn't slosh around all that much.
        
         | Tagbert wrote:
         | They were very comfortable in many cases. The water container
         | conformed to your body and provided very evenly distributed
         | pressure. Having a heated bed was very nice in the winter. You
         | usually had an extra pad on top to reduce contact with the
         | vinyl container. It was hard to sleep with someone else though
         | as their movements tended to cause you to bounce around. Later
         | versions had baffles that reduced the motion of the ocean.
         | 
         | They were very heavy. I had to get rid of mine when the
         | downstairs neighbor could no longer open her door due to
         | warping of the doorframe in a very old house.
        
       | ExtraE wrote:
       | Dang, can you merge this with the other link to the same article
       | that's also on the front page?
        
       | mcv wrote:
       | When I was a kid, I remember my grandmother used metal hot water
       | bottles with a crocheted cover. My wife has recently started
       | taking a cola bottle with hot water (not boiling, or the plastic
       | will melt) to bed. Perhaps I should give her one of these fancy
       | rubber ones.
        
         | LeanderK wrote:
         | here in germany you can buy the rubber ones with cloth over it.
         | They are way more comfy and don't get super hot. Regardless of
         | the temperature in my room, my girlfriend is always cold, so
         | every night I fill it up to warm the bed
        
           | masklinn wrote:
           | > here in germany you can buy the rubber ones with cloth over
           | it.
           | 
           | There are even different thicknesses of cover, depending
           | whether you want lots of heat (thin cover so you don't get
           | that rubber feel) or more of a lower temp and slow release
           | (thicker padded cover).
        
         | arethuza wrote:
         | When I was a kid (I'm in my 50s) my parents had _ceramic_ hot
         | water bottles that had knitted covers.
        
         | downrightmike wrote:
         | as long there is water at the level the flames touch, you can
         | boil water in a plastic bottle, it will deform though.
         | https://www.youtube.com/watch?v=zzKN0n0WB6Q
        
       | sneak wrote:
       | The only reason this is a thing is because of our habit of
       | building cheap buildings that aren't insulated well.
       | 
       | In modern times it is more than possible to build well-insulated
       | buildings that can be heated affordably to reasonable indoor
       | temperatures everywhere in the living space.
       | 
       | Almost nobody does this.
        
       | baud147258 wrote:
       | Since there's a few people here using hot water bottles and I
       | didn't found the information in the article, how long does a hot
       | water bottle stays hot? (starting from hot tape water or boiling
       | water from a kettle)
        
         | jkubicek wrote:
         | I have a hot water bottle that I use occasionally in the winter
         | months. Filled with boiling water it'll be too warm to handle
         | for about 45 minutes, then comfy for hours. Tucked under the
         | comforter it's frequently still a little warm in the morning.
        
         | qwertox wrote:
         | If you use it to warm your feet by putting it on the floor and
         | having socks on, resting your feet on it but changing position
         | because of the heat, around one hour, a bit more.
         | 
         | If you use it to have something warm in your bed, if you leave
         | it below the blanket it will still be warm in the morning. But
         | putting it with boiling water in the bed means that you just
         | can't touch it because it's really hot. You may put your feet
         | on it for 10 to 20 seconds or put it on your stomach for the
         | same amount of time, to heat up quick, but then you need to
         | place it somewhere where it has no direct contact with you.
         | 
         | I just love mine, which is one made of flexible rubber (or
         | pvc). When I get up I start making my coffee and in parallel I
         | heat up a kettle of water until it boils, then i use that one
         | under the desktop for my feet. Sometimes I put it on my lap or
         | hug it for a while. It's worth it, but only during the winter.
        
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