CO2 - 60L SodaStream Exchange Cylinder, Turns Water To Sparkling Water In Seconds, Co2 Cylinder Contains Pressurized Pure Beverage Grade Carbon Dioxide & Is Made Of Lightweight Aluminum, Control The Sparkle In Their Drink By Adding As Much Or As Little Co2 As They Prefer, Exchange & Spare Co2 Cylinders Create Customer Convenience, When Cylinder Is Used Up, Customers Simply Exchange It For A Full One, Paying Only The Cost Of The Refill, Empties Are Returned By The Retailer To SodasStream To Be Cleaned, Inspected & Refilled, Spare Cylinders Are Also Available For Customers Who Want To Keep Extra Co2 On Hand, THIS ITEM IS ONLY AVAILABLE TO APPROVED RETAILERS.