Being able to run to the nearest bar and have your growler filled with fresh beer is great. Trying to strap it down for the trip back? Not so much. Growler On Board ($30) is designed for just this purpose, holding up to three 1/2 gallon or 2L growlers in place in a seat, in your trunk, or on the floor. In addition, its low density foam construction means it also offers a bit of insulation, which is great for when you want a drink as soon as you get home. [Scouted by Sam]