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PETE plastic bottles are good containers that can be used for storage of shelf-stable, bulk dry foods that you normally keep in canisters in your pantry. Normal kitchen canisters do not have air tight seals. As a result, with changes in atmospheric pressure, air and moisture are pumped in and out of the products causing them to become stale more quickly.
Because of their oxygen/moisture barrier qualities, PETE bottles can be used as canisters to better maintain the freshness of stored dry foods. If you want to store these items for a longer time period, the use of oxygen absorbers in the PETE bottles will protect against insect infestation and help preserve quality longer.
PETE bottles are food grade. That being said, this method of food storage should (in my own opinion) be used for short to medium term storage. I say this because after 2 or 3 years of no oxygen the plastic may let oxygen seep through it. I would recommend reading the article in the link below for excellent advice.
Bonus: How to Make Pemmican, the Original Survival Food
Invented by the natives of North America pemmican was used by Indian scouts as well as early western explorers.
Native Americans spent a great deal of time on the go and depended on having portable, high-energy, highly nutritious, and filling foods that would last for long periods of time without refrigeration.
Pemmican is a portable, long-lasting, high-energy food. It's made of lean, dried meat that's crushed into powder and mixed with hot, rendered fat. This makes it one of the ultimate foods to have stockpiled for when SHTF or disaster strikes.
People really should avert their gaze from the modern survival thinking for just a bit and also look at how folks 150 years ago did it.
These guys were the last generation to practice basic things, for a living, that we call "survival skills" now.