Diatomite Soap Tray l White Dimensions: 3.4 x 3.7 inches This antibacterial soap tray is made from a renewable earth stone called diatomite. Very fast-drying, it will extend the life of bar soap. - Antimicrobial & mildew resistant - Renewable earth stone material - Dries in seconds This soap dish is dishwasher-safe. Alternatively, rinse with water and scrub with a brush. Use a fine grit sandpaper gently across the surface of the soap dish to refresh the absorbency. Designed and distributed in Philadelphia USA.