Easy and fun, make your own seltzer water at home. Highest quality CO₂ 8 gram chargers from the Austrian masters at an incredible price. This charger delivers a super carbonated soda water for all you beverages. The Kayser CO₂ is guaranteed to give you a strong effervescence with no aftertaste. Each box contains 10 chargers. These are compatible with all brands of CO₂ soda siphons (except the Soda Stream Products). Siphons sold separately