I bought it because it fits the screw-on 500ml bottle, it's a camping stove [tent], definitely cheaper than the equivalent ones on Amazon and basically you can find the gas canister everywhere, even in a village grocery store. Its performance is better than I expected, I tried it in a 12 square meter room and it heated the space quite well in 30 minutes, although it wasn't very cold, but it did the job. Its portability is a great advantage!