The Marrow is one of the most popular earthenware mug styles and comes in a choice of black, blue or white. 100% dishwasher proof. This product is treated with our patent protected, fully certified AntiBug® treatment to keep germs at bay. The specialist surface starts to fight germs as soon as they come into contact and has been clinically proven to kill 99.9% of harmful bacteria from 50 common organisms such as MRSA, E.coli and salmonella and will continue to fight for the lifetime of the product.