Jacqui... nice to see your byline again... an option for an alcohol, paraffin (sooty), gel or twig stove...I opened up the fuel feed hole of a Swiss Ranger stove ($10US about 3 years ago), originally to fit the Trangia, and then enlarged it to fit the Sterno canister... I was not aware that there were smaller Sterno canisters, and would not have opened it up as much for a do-over... the 500ml cup has tapered sides and heats quickly... with the kit is a spun aluminum bottle with cork top that nests...