The GrowlerWerks uKeg 64 is a mini keg in the size of a half-gallon growler, keeping beer cold and fresh. On the go or at home. Durable, double-wall vacuum insulated stainless steel. CO2 regulator cap with customizable tap handle and gauge. Brass carrying handle. Includes two 8 gram CO2 cartridges. Features: uKeg - keep beer fresh for weeks. VPR Cap - automatically regulates pressure to optimally carbonate beer. Choose desired carbonation level, from zero (off) up to 15 psi. Vessel - durable, double-wall vacuum-insulated stainless steel. Pressure Gauge - easily read the pressure inside the growler. Dispenser Tap - easily pours beer any time, without removing cap. Plus taplock to prevent dispensing. Interchangeable Tap Handle - handle can be changed to personalize or represent your favorite brewery. Sight Glass - shows contents of uKeg and how much is left. CO2 Cartridge - uses low cost, food-grade CO2 cartridges.