All fuel canisters/stoves were required to have a threaded fitting assembly for the fuel/stove connection. I used my last "press on "type fuel canister for my Hank Roberts Mark III stove and switched to a Snow Peak stove. I recently acquired a Coleman single burner stove that uses a butane fuel cartridge and the cartridge to stove fitting is a press on type. They are Gas brand fuel canisters not Gaz and they have threaded fittings. The Gaz brand fuel canisters (green colored ones) which are available at Sportsman Warehouse are now the threaded type.