SodaStream Crystal Turn tap water into sparkling water or flavored soda with a touch of a button. Choose from over 60 better-for-you regular diet and all-natural soda mix varieties with no high-fructose corn syrup and no aspartame 4-ounce starter CO2 carbonator makes approximately 33 cans of soda Kit Includes, Crystal unit with glass soda bottle,4-ounce starter CO2 carbonator, 6 Flavor SodaMix Taste Sampler Once empty exchange the 4-ounce starter CO2 carbonator for a full 60-liter carbonator with included mail-in rebate at over 15,000 locations