I use the 4.5kg butane calor cylinder, works well. Obviously bigger and heavier than the screw in cans, but not a problem as our van isn’t a camper, we tow a caravan so space isn’t so limited. If I was using my van as a camper then I might have gone with the smaller screw in type.No theres 2 options when you buy the safari chef. Either the high pressure that uses the screw in cans or the low pressure that uses campinggaz or calor. I/m about to pull the trigger but not sure which to get