For years we've used soda cans with pull-tabs on top. Applying the pull-tab concept to all sorts of canned goods is one of the greatest preparedness innovations I've seen lately. I've always needed to store a can opener in at least one of our 72-hour kits (and probably should have had one in every kit). Can openers are heavy, bulky, and awkward even if you found the light-weight version. But, it was necessary to pack them in order to open and eat any ready-to-eat canned foods. Now, I can skip the can opener. I specifically choose only cans with pull-tab tops to store in our 72-hour kits.