That in an emergency, we would need an emergency item - a manual can opener! We use an electric one as I find manual ones difficult to use. We do have a manual one but to be honest, it is about as much use as a chocolate teapot!
We ordered and have just received a butterfly opener and 2 x military issue P51 can openers:
DB was happy to show me how to use the military version as he had knowledge of them.
Yeah, yeah, I hear you say, what kind of emergency are you thinking of? A prolonged power cut for one thing, breaking the tab of those so called easy to open peel back cans (done that numerous times). Spam and corned beef keys are notorious for breaking halfway around the tin.
What I like about the P51 are their small size (easy to operate though) and the fact they can be threaded onto a cord for safe keeping if you are out and about camping.
Another to do thing checked off my list!