Eco water box ? the environmentally friendly version. This practical water cup is the perfect addition to the Pelikan paint box K12® or K24®. The brush cup can be attached directly to the base of the paint box, allowing quick and clean work at school or at home. This water box not only has a round quiver for storing brushes while painting, but also cavities for storing brushes. The post consumer recycled material used is the most sustainable material.