Beer: after a long day in the outdoors, nothing’s better—and TrailKeg’s Half-Gallon pressurized growler is here to keep your brew cold and carbonated wherever you take it. Lightweight and easy to use, the TrailKeg is the fun item you never knew you needed. I’m not sure I trust it to be leak-proof, so don’t pack it with your extra fleece. And have the bartender fill it with a hose to minimize foam. $150.