Net Wt. 14.5 oz. CO2. Overpack: CO2; E290; Carbon Dioxide. Depending on level of carbonation and type of sparkling water maker. This SodaStream cylinder is provided under license and remains the property of Soda-Club (CO2) Atlantic GmbH or its affiliates. It should only be maintained and refilled by SodaStream. Unauthorized refilling of SodaStream Cylinder by third parties could be risky, may violate the law and infringes SodaStream's rights. SodaStream only warrants the safety of SodaStream Cylinder refilled by it, bearing a SodaStream 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 may return this Cylinder in good condition without exchanging it and receive a return free of US $1 or local equivalent. Cylinder valve approved. DOT Approved. This cylinder was filled and checked by SodaStream International BV. www.sodastream.com. Instructions for installation and use on www.sodastream.com. Customer Support Information: 1-800-763-2258. Out of gas? Swap & save. Bring your empty container to any participating SodaStream retailer and take home a full one for a special exchange only price. Earth Friendly: Fewer empties to recycle or throw away. Less manufacturing. Less transportation. Made by SodaStream Industries Ltd, Israel.