The P-51 looks promising. I once went to Canada and made some jumps with the now defunct Canadian Airborne and went on some excercises. They gave me a large P-38 thing that is super for opening cans with gloves or mittens on. Looks about like the P-51. The really nice aspect of the trusty old P-38 is that it is so compact and light. One of those classic inventions that keep going and going. The thing is, today most cans have pull tabs on them. When I was a kid and we went backpacking, everything was in a can, today nothing comes in cans. They are heavy, you have to pack them out and most stuff can be had in foil packs today. Cheers!
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No, I am not Bear Grylls, but I stayed at a Holiday Inn Express last night and Bear was there too!