Compatible only with pink system. This cylinder is: (1) proprietary to soda-club (CO2) atlantic GmbH (LLC) or its affiliates (SodaStram); (2) patent pending and protected by the other intellectual property rights; and (3) provided under license and remains the property of SodaStream. Unauthorized refilling of this Cylinder by third parties may infringe SodaStream's intellectual property rights, including patents, and other proprietary rights, may be risky and may violate certain laws. In accordance with the license this cylinder should only be maintained and refilled by it, bearing a SodaStram tamper proof valve seal. When empty, please return this Cylinder to SodaStream or to an authorized SodaStream dealer in exchange for a full SodaStream Cylinder, for the price of the gas refill, or you should return this Cylinder without exchanging it and receive a return fee of US $1 or local equivalent. You may not remove or change any proprietary notice appearing on or accompanying this Cylinder. www.sodastream.com. Store locator. sodastream.com/2. For use with sodastream sparkling water makers instructions for installation and use on www.sodastream.com. Customer Support Information: 1.800.763.2258. Quick Connect: Patient pending technology. Earth friendly. Fewer empties to recycle or throw away. Less manufacturing. Less transportation.