The cooker can be used with all screw-in cartridges, e.g. Optimus, MSR, topgas, etc. The gas mixture does not matter for the cooker. The gas mixture does not matter for the cooker, most cartridges contain a mixture of butane and propane. For use in very cold conditions (winter) there are mixtures of isobutane and propane, which are supposed to be better. I have had no experience with these.

Yes, definitely.

Completely normal screw-in cartridges. 100g or 200g. For example Primus or the MSR cartridges.

ask the customer service

Unfortunately, we are not allowed to store gas. That is why we do not have any cartridges in stock.