The largest Paper Boat in the world.

As a kid, I used to make paper boats, which also doubled as hats, from newspapers with my grandfather. Take a look, This particular paper boat was made by German artist Frank Boelter, and is made entirely from Tetrapack (the material used for milk cartons). He claims it should stay afloat for about 40 days, which is far better than the 40 seconds my newspaper boats would float.