All disposable cartridges with an EN 417 screw thread. There are also bottles in "spray can" format in the craft section of the DIY store. These are often cheaper than the ordinary ones from camping supplies.

All smaller gas cartridges with valve and thread, e.g. Primus Power Gas.
With suitable and additionally available adapters, larger cylinders can also be used, e.g. Campinggaz R 904 and R 907. There are also adapters for large cylinders available from DIY stores.
If you are not using the small threaded cartridges, we recommend using the longer connection hose, which is available separately. However, assembly is difficult and requires partial disassembly of the cooker.