Refilling your cylinders outside of SodaStream is not a good idea. Once SodaStream cylinders are received for refilling, the cylinders are emptied. After that, a small amount of CO2 is used to sterilize bacteria, removing all foreign air and humidity from the cylinder.
Did you know that all of our cylinders are also quality tested 3 times when refilled? SodaStream cylinders should only be maintained and refilled by SodaStream. Unauthorized refilling of cylinders by third parties could be risky. SodaStream only warrants the safety of cylinders refilled by us, and SodaStream is not responsible for products of any other company or brand, which may damage the Sparkling Water Maker and void the warranty.