Roof boxes are a necessary evil from time to time — so why not make sure they do something more for you than just carry your stuff? The Boatpack ($1,600) is an ingenious box that, as the name suggests, doubles as a boat. Crafted from Acrylic-capped ABS plastic, the 'pack is double-skinned, offers a capacity of 650 Liters, and can unclip from its base in seconds. As a boat, it weighs under 50 lbs., and includes a wooden seat, folding oars, and rowlocks. It's a great way to make your summer adventures a little more fun.