I don't know what made me think of it but I do like the small cooking "pot" idea. O_S's mug idea could work too. Those metal Sierra cups are dumb for camping but in an emergency situation? The ability to heat water makes the "I need a fire to prevent hypothermia" idea reasonable - to me anyway. I still think an ounce of prevention is worth a pound of cure but yeah, shit happens.

Could be twenty years ago but I once bought a friend a small aluminum box - just 'cause I saw it and thought of him. I don't remember if it had a gasket but it had flip type closures on both ends. It was nice. Cheap too. With the big bottom and a lid, I expect it could heat water rather efficiently in an emergency type situation. It would make a quick small fire worthwhile. I still just can't envision a fire big enough to warm me unless I washed up at a protected campsite with oodles of welcome wood.

Hey, let's be careful out there.