SodaStream bottles are specially designed, high-pressure-resistant bottles for use with their soda makers. Each bottle has a lifespan of 3 years and is not made with any polycarbonate materials or substances that produce phthalates or PCBs, ensuring an environmentally-friendly product. BPA-Free! Each bottle has a one-liter capacity (33 fl. oz.) and may be reused until the expiration date printed on the bottle. The hermetic sealing cap preserves fizz for up to two weeks. Each SodaStream bottle replaces over 2500 bottles and cans from store-bought drinks. These bottles are hand wash only. Set of 2.