Most water bottles are sold to sports enthusiasts who like to stay hydrated during their workouts. Or to regular people who simply want to have some H2O handy. But the Aquabook is a little different. Shaped a little bit like a book, flat and rectangular and the size on an A5 sheet, it is meant to fit perfectly in a backpack or carrying case already full of books and papers. Cylindrical bottles will obviously take up a whole bunch of room and leave empty, inefficient spaces in your bag. The Aquabook carries 25 ounces of water, is made of BPA-free plastic, comes in 5 colors, and ships with cleaning tabs and brushes to ward off bacteria. It’s a €20 ($22USD) pledge to get your own, and you’ll have to wait until February 2016 to get yours.