My Swedish Army Trangia burner (genuine) . How? well, I noticed a build up of gunk on the inside so decided to give it a quick tap on the edge on the marble worktop, not too hard or so i thought. Turned it upside down, got all the debris out of the well, filled it with meths and the (non) flaming thing decided to empty itself all over the floor. On closer inspection there is a lovely crack/split on the bottom edge a good three to four centimetres long . Might try soldering/brazing it if I can be bothered, all my years of owning Trangias though and I've never had anything like this happen before.