The growler, those slightly folksy refillable bottles of beer, are back in a big way, but this one does you one better. This mini keg is jam-packed with utility. To keep your precious cargo chilled for hours on end, the uKeg is double-wall vacuum insulated, and its CO2 regulator cap maintains carbonation. The pressurized tap allows you to pour perfect pub-quality pints right from your own fridge.