Which CO2 cylinders is the Infinity soda maker compatible with?

Both the Infinity and the Infinity-S are compatible with all standard CO2 cylinders with a blue screw thread.

The cylinder is not included with the soda maker. The reason: many supermarkets and drugstores only accept their own house brand for cylinder swaps. You can comfortably buy your cylinder at the supermarket of your choice and exchange it cheaply when needed.

Note: All pink Quick-Connect cylinders (e.g. from SodaStream) are not compatible.