Bitz mugs with handle made of black stoneware. Matte black on the outside and assorted amber, purple, pink and cream colored inside. Contains 30 cl. DIA. 8.5 cm. H: 10.0 cm. The stoneware is made with a beautiful reactive glaze that gives it extra glow. The stoneware can withstand machine washing, microwave and oven up to 220 degrees. Bitz Matte and Reactive Glaze makes each product unique. Scratches and cutting marks will be visible. This is not an error. Bitz concept.