Every morning I boil two eggs for ten minutes. My gas canister emptied faster than I thought it would. Now I had noticed that most of the air heated by the gas never touches the pot. I had another burner with half the diameter of the one I had been using. That means 1/4 the circumference, so it would presumably use only a quarter as much gas. I gave it a try and the eggs are cooked pretty much the same in that ten minutes. Nice to get a pleasant surprise.