Can Opener on a Keychain
Storing lots of canned food can be a great plan for survival situations, but it's not going to be much help if you don't have a way to open them. The P38 and P51 keychain can openers produced originally by the US Military are super light, compact and inexpensive options for solving this problem.
https://www.armysurplusworld.com/p38-can-opener
P38 & P51 Can Openers
survival