The plastic case they come in is excellent and tucks away anywhere on the bike. Room in the case for a cigarette lighter, one in each case so no issues with matches.
Don't be fooled by the small size, this is a super cooker and 2 of them do everything my 2 ring gas cooker does but these will fit in your pocket.
Excellent flame, good control and very very fast if needed so hot soup or tea in a few minutes. I use a wind shield that doubles as a brace and usually carry spare gas so that we can use the 2 stoves at the same time. We like our food and will cook some rather exotic meals and they are excellent for that. We have used them on extended trips and there isn't anything to beat them for space and convenience.
Halfords and most car places stock the gas refills in Ireland too and we had no problem getting refills in supermarkets in France.
I have used a lot of different stoves in over 40 years camping and find these the best and most convenient unless you are doing extreme cold or remote.
The only issue I had was one night one of the stoves would not seal to the gas cartridge. A search revealed there is an O ring in the underside of the stove that became dislodged. So now the plastic case also carries a couple of spare O rings.