Review on Efficient Co2 Adapter: Connect SodaStream to Paintball Co2 Refill - 60 inch Hose with Accessory Kit - Direct Connect to TR21-4 - Co2 Adapter for 20 lb Tanks by Mark Caperton

I've been using it for 11 months now and I really like it. The adapter hose connects directly from the 20-pound CO2 cylinder to the back of the Soda Stream, bypassing the gas refill cylinders entirely. And it saves a ton of wasted gas and the hassle of filling Soda Stream gas tanks! And it's just an AMAZING PRICE: A 20 lb tank holds up to 11 of the 130 liter Soda Stream refill gas cylinders ($35 each) and is $32 at an industrial gas supply location.