Nitro Chargers 16 PackiSi Nitro and iSi Nitro Charger are used together to prepare barista quality Nitro Cold Brew Coffee. Nitro coffee is created by infusing cold brew coffee with pure nitrogen gas. The nitrogen infusion results in a rich, flavorful brew with a naturally creamy texture and a velvety foam head. For the preparation of Nitro Coffee, Tea, and other Nitro infused creations. Benefits of the high quality iSi Nitro Chargers for perfect results: Each iSi Nitro