The SodaStream drinksmaker is a device that forces carbon dioxide (CO2) gas (stored under pressure in a cylinder) into water, making it fizzy. The product includes a machine, a carbon dioxide cylinder, and one or more reusable beverage bottles. The bottle, filled with water, is threaded onto the machine, and with a button push or two, compressed CO2 from the cylinder is injected, creating carbonated water. Varieties of concentrated syrups are available, to create regular or diet soft drinks by adding a small amount of concentrate to the bottle after carbonation.
Different flavours are created by adding fruit-flavoured concentrates. During its heyday, several famous brands were available in SodaStream concentrate form including Tizer, Fanta, Sunkist and Irn-Bru. SodaStream also offers diet concentrates sweetened with Splenda, and is used as much for plain sparkling water as for soft drinks. SodaStream and Kraft Foods entered into a partnership in January 2012 involving the use of the Crystal Light and Country Time brand flavours with the SodaStream home carbonation system. In July of the same year, the two companies expanded their partnership to include the Kool-Aid flavour line. In 2013, SodaStream partnered with Ocean Spray to market three Ocean Spray flavours for use with the SodaStream home soda maker.
In February 2013, SodaStream and Samsung announced that Samsung refrigerators with built-in SodaStream sparkling water dispensers would be available in the United States beginning in April.
Excluding the purchase price of the machine, typical cost to the end user (2015, United States dollars) is 25 cents per litre of carbonated water generated plus another 50 cents per litre for the soda syrup. Pricing in other countries may vary.
This often renders SodaStream drinks more expensive than pre-mixed store brand colas, presumably due to the price of soda syrup in small retail quantities.