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Almost everyone has at least one tin can somewhere in their home. Most preppers have lots of them, but even non-preppers are bound to have a can of beans or something. Because of this, you shouldn’t have much trouble finding a tin can after the SHTF (just look in the trash if you have to).
Why does this matter? Because tin cans have all sorts of survival uses. You can use them to catch prey, cook food, filter water, signal for help, and much more. Learn the many uses for tin cans now because they could come in handy someday.