Fizzy soda water from the Austrian masters! As with the higher priced iSi brand, this charger delivers a super carbonated soda water for all you beverages. The Kayser CO2 we sell is guaranteed to give you a strong effervescence with no aftertaste. If you're used to iSi CO2, give this box a try! Each case contains 30 boxes of 10 chargers (total 300 chargers).