Each Austrian-manufactured iSi Soda Charger is made under rigorous quality control. All chargers are individually weighed and stamped with a lot number that can be traced back to its date of manufacture. These standards ensure you receive the right amount of pure gas, every time, guaranteed. Designed to work exclusively with our iSi Soda Siphons or iSi Cream Whippers, our chargers are made of high-quality steel, are 100% recyclable, HACCP-certified, and never expire.