This project began with the image of a stone slab that had been washed by water over time. The shower tray is nothing more than a smooth, edgeless surface. It is set flush with the floor, made of cast mineral with a stone-like, scratch-resistant surface. The removable water drain cover is made of the same material so that it is perceived as one and the same surface. The newly developed drainage system underneath can accommodate greater quantities of water, from rain showers, for example.