https://bestrecipes.ma2roc.tech/2024/12/28/heres-how-to-open-a-can-in-an-emergency-this-is-so-simple/

Of course, the smartest thing to do is plan ahead and make sure you include a manual can opener in your shelter-in-place kit. But if a zombie apocalypse or camping mishap takes you by surprise, you definitely don’t have to starve.