No, SodaStream strongly advises against this. SodaStream licensed CO2 carbonators are filled with beverage-grade CO2 in compliance with exacting FDA standards for food and beverage safety. Your local filling station may not be in compliance with these standards and could possibly introduce toxins into your CO2. Furthermore, unauthorised filling machines may cause damage to the carbonator. Damaged carbonators will not be accepted for return by SodaStream. Any CO2 filling by parties other than SodaStream authorised filling stations violates the User License.