The iSi Professional Chargers are the best cream chargers to date. The Professional line is 20% more efficient than the original cream chargers, which means you use less cream and fewer chargers. These chargers are compatible with all iSi Whippers, so there is no need to invest in new equipment. Each Austrian-manufactured iSi Cream 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. The Professional Chargers are made of high-quality steel, are 100% recyclable, HACCP-certified, and never expire.