SodaStream CO2 Cylinders make you sparkle, and with a spare on hand, you will never go flat! Combined with a SodaStream Sparkling Water Maker, you can control the bubbles in your glass by adding as much, or as little, carbonation as you prefer. This cylinder makes up to 60L of sparkling water. When your cylinder is empty don’t buy a new one. Simply exchange it for just the cost of the refill!