The Cornical™ Unitank allows fermentation, carbonation, and dispensing all in the same vessel! This patented design is like nothing else on the market. How does it all work? The Cornical™ Unitank conical 7 gallon fermentor is based on a full featured conical bottom, clamped to a Cornelius type keg upper. This powerful combination gives the brewer all the features of a conical fermentor, and the 50 PSI pressure capability makes it a true unitank so you can ferment, carbonate, and dispense in the same vessel.