@Philreedshikes Yes, the canister is the one that contains 220gr of fuel. To be honest, where I live it is next to impossible to buy the smaller ones, I've probably seen the bigger (440 gr?) ones as much as I have the smaller ones. And, also unfortunately, about the only place near me that carries them is the big w-mart, and they only carry Coleman, and only in the 220gr size. So I always take that size canister, although I may take one that's half full or whatever I need, and I have an adapter to transfer partial cans. Keep in mind that I never "boil" water, just get it close to boiling.