Magical ON/OFF Switch Color Changing Mug-Black

Material:High quality ceramic,more healthy than plastic cup Black mug will change white magically. Material:High quality ceramic,more healthy than plastic cup Black mug will change white magically. Black 'off ' message turn 'on' message after injected hot coffee. Work with coffee,tea,milk at office or party,coffee house,house home. niceEshop quality warranty and brand new items.