Enjoy even more of your favorite SodaStream beverages with the Source carbonating bottles twin pack Enjoy even more of your favorite SodaStream beverages with the Source carbonating bottles twin pack Made from BPA-free plastic One SodaStream Carbonating Bottle can help the average family reduce more than 3,700 bottles and cans from our planet Hermetically sealing cap not only keeps your fizz fresh, but you can take a sip, re-seal, and sip fresh bubbles again later Compatible with Fizzi, Fizzi One Touch, Source and Power Sparkling Water Makers After bottle is expired, use only for drinking flat waterWHAT'S INCLUDED Two 1-liter bottles Size: One Size. Color: Multicolor. Gender: unisex. Age Group: adult.