Co2 Supply A Co2 cylinder is sufficient for approximately 60 liters of carbonated water and you can also replace empty cylinders at your local retailer or through our online service. One of the most important features of the Co2 cylinder is that it is small in size compared to other home machines used in the kitchen. The cylinder of the soft drink machine is made of durable plastic, so it can last for a long time and you must maintain it. The Co2 soft drinks cylinder is compatible with all popular brands of 60 liter carbon dioxide cylinders.