Mechanical engineering students at the University of Washington stunned and amused judges at the annual Milk Carton Derby in Seattle as they paddled their way to 2nd place in the worlds first 3d printed milk carton boat! Taking a unique slant on the traditional Milk Carton Derby design regulations, the team at WOOF (Washington Open Object Fabricators) researched, designed and printed their boat almost entirely from recycled milk cartons. Weighing 40+ lbs the WOOF entry is the only boat that is 99% milk cartons, requiring some 250 one gallon milk jugs to produce.