SodaStream Carbonating Bottles bring the fizz and keep it fresh and bubbly for up to 2 weeks! They are the perfect personal size for on-the-go. One SodaStream reusable carbonating bottle can save up to thousands of single use plastic bottles. Always fizz water before adding any flavor. FYI:) BPA-free plastic bottles are hand wash only and can be reused until the expiration date printed on the bottle. Compatible with all Sparkling Water Makers except for the Aqua Fizz, Crystal, Penguin, Fountain, Jet,Genesis.