Share a nice hot drink in matching mugs. Our 10oz colour change, magic mug is an extremely popular gift, as the custom print is not revealed until used, creating a unique surprise. The mug starts with a black glossy outer when cold, however when warmed up the printed image appears. The print appears everytime the mug is warmed up. To keep the colours vibrant we recommend hand-washing. Glossy exterior when cold. 285 ml capacity. Size; 9.4cm (h) x 8.1cm (dia) x 11cm (length with handle). Weight; 400g. Material; Ceramic.