Pure Nitrogen (N2) chargers make preparing Nitro Coffee and Nitro Beer fast and easy. Please note they will not whip cream. Nitrogen Cold Brew Coffee is coffee charged with nitrogen to give it a sweeter, creamier and richer texture with a head similar to Guinness. The nitrogen reduces the acid taste of the cold brew coffee making it more palatable. Nitrogen restricts the amount of oxygen in the coffee which slows down the rate of oxidation which makes coffee sour and bitter the longer it sits. Therefore because nitro coffee retains its fresh flavour it can be prepared in advance before serving it or adding it to other drinks and dishes.