 On the fuel canisters, I'll give about two days on the smaller canister, and that's my safety cushion. I'm sure you could get more than that, but I had to use one for a heater before just because we were hunting and it was so cold and we were kind of in bad shape, so I used it to heat us up a little bit, keep us warm. But, yeah, you're multi-fueled. They're pretty nice. I guess I'm biased. I like the smaller isobutane stoves.