2 x 1 lt. Carbonating Bottles: For carbonating drinks in your SodaStream soda/drinks maker. Rinse bottle in lukewarm water before use. Keep bottle full of water in refrigerator. Carbonate water only without syrup. Do not wash in hot water or dishwasher. Never remove bottle from machine while carbonating. Never use the bottle after the date printed on it or if damaged. Please read the instructions printed on the bottle and soda/drinks maker manual. BPA free. Earth Friendly: No empties to recycle or throw away; no batteries or electricity. Customer support toll-free: 1-800-763-2258. www.sodastream.com.