1. TrailKeg ($200) Get the most out of a great craft beer by toting it in this pressurized one-gallon growler with a self-serve tap. The lightweight, vacuum-insulated container keeps beer cold for 24 hours and keeps it carbonated for several weeks. Buy it at Amazon. 2. Dometic CoolFreeze CFX 35W ($799) Tired of hauling ice to a campsite only to watch it melt?