SodaStream carbonating bottles are made from high-strength BPA-free plastic, made to handle the pressure of carbonation. The hermetically sealing cap not only keeps your fizz fresh, but unlike other popular brands, you can take a sip, re-seal, and sip fresh bubbles again later. One SodaStream bottle can help the average family reduce more than 3,700 bottles and cans from our planet. Don’t forget to exchange your empty gas cylinder at Guest Services and save up to 50percent. Gender: unisex.