CHAPTER 36 - LINERS & BAGS
If you want to store food in containers not considered to be food grade such as regular plastics, metal barrels, etc., use of a liner will help protect your food from undesirable elements.
Mylar bags are most often used as liners and can also be used as stand-alone containers for food but require more careful protection from puncture then do plastic or metal containers.
Some people use Mylar bag liners even with food-grade containers in order to provide multiple layers of protection for the foods within and also because there is debate and disagreement over whether any plastic, food grade or not, is safe from releasing toxins that the food then absorbs so Mylar liners help solve that confusion if desired.
Mylar bags are thick and resistant to tearing and if cared for correctly in the right temperatures and away from rodent access, foods contained in Mylar can last 20 years and even longer sometimes.