• Compatible with all brands of soda makers that use the threaded screw in 60L CO2 cartridge including Drinkmate, Sodastream, and others. • Four cylinders included. Each can make up to 60 liters of carbonated drinks. • Use the shipping carton to do a simple online exchange without having to leave home. Use the prepaid shipping label to send back empty cylinders, and we'll email you a gift card for your next purchase. • Drinkmate's online exchange program also accepts SodaStream cylinders for recycling and refill.