Puncture canisters have fallen foul of European health and safety regs. The stoves stopped getting sold several years ago (10 ?), and the canisters to use with old stoves have been getting slowly less common ever since.[/quote]
Whilst I'm not all that keen on 'elf 'n' safety (gorn maad) a mate of mine was unfamiliar with that type and when looking closely saw that the spike on the stove had to puncture the can - so he just jammed the spike in, rather than screwing up the base as your are supposed to. Would have got away with it too had he not been using his (naked flame) carbide caving light. Blew the stove 50 yards into bushes, blew out the base of the gas can, though he got away with a singed jacket and sans eyebrows ! We were a couple of miles away talking on the radio, heard much swearing, then a bang, silence, the the bang again carried at the speed of sound direct.