Now, do you have an electric can opener? It's probably very nice. Do you have a hand-operated one if the power is out? Do you have a spare? We only use hand crank can openers, and recently the one we had broke and we had no back-up in place. That has now been rectified.
Here's another thought: do your kids know how to use a can opener? Have they ever tried to use one? Obviously very young children cannot use an opener, but what about preteens and teenagers?
Food for thought.