Make your SodaStream even that much more enjoyable and useful with these spare/replacement bottle. Having extra bottle on hand will allow you to keep several flavor options in the refrigerator at all times. Each 1-liter SodaStream bottle is specifically designed with a special hermetic sealing cap to maintain carbonation and flavor while remaining BPA-free. SodaStream bottles are specially designed for high-pressure resistance and are the only bottles that can be used with SodaStream soda makers. Reusable carbonating bottles last for three years with hermetically sealed caps to keep drinks fresh and fizzy. Use different colored bottles to denote different flavors such as regular versus diet. Includes two SodaStream extra carbonating bottles. SodaStream bottles are the only bottles that can be used with SodaStream Soda Makers.