SodaStream Carbonating Bottle for Play and Source Soda Makers, 1-Liter/3.38oz, 3-Pack 3 x SodaStream PET bottles for Source / Genesis / Play soda makers (won't fit to other devices) Expiry date in 2-3 years from purchase day Extra carbonating bottles for Sodastream soda makers Easy to clean Hermetically sealed caps retain carbonation longer