HK CO2 Tank Cylinder Adapter for Soda Stream Terra & Art Maker Allows you can use the old Soda stream Co2 bottles(blue) and the new Soda Stream CO2 bottles(pink) in the Soda stream Terra. This adapter only fit for Soda stream 425 gram aluminium CO2 cylinders. What HK Soda Adapter Can Give You? Upgrade Co2 Adapter Starts Here - Old Soda stream Co2 bottles(blue) will not work with the soda terra maker system and will require more pink backup canisters, HK CO2 adapter can perfectly connect soda terra maker and old Soda stream blue 60L 425g Co2 Cylinder, It's definitely the best option right now! Specifications: Product Name: Quick CO2 Adapter for Soda Water Maker Fit: for Soda Stream Terra & Art Water Maker Material: Aluminum Color: Pink Condition: 100% Brand New