Wash,store and safely transport mugs and cups. Open inside compartments ensure thorough cleaning. Closed external walls keep fingers and contaminants out. Tilt feature drains water from mug bases for quick and sanitary drying. Smooth sides and rounded corners reduce risk of injury. Smooth top rim ensures quick, stable stacking. Inter-stacks with all other racks. Durable, long-lasting polypropylene will withstand chemicals and high temperatures up to 200 degree F (93,3 degree C). Fits through any commercial dishwasher.