Specifications:Material: heat sensitive porcelainSize: height 9.5cm， mug diameter 8cmCapacity: 350mLThe mug is made of heat sensitive material， when hot liquid is poured in， the black cup turns into white and the sleeping face turns into smile faceNotes:1， Don’t expose under the sunshine for long time2， Don’t scrape on the printing with sharp tools3， Wash with hand， not suitable for dishwasher machine4， Liquid temperature should be over 70℃ and then the color changes. Be careful with hot water5， Do not microwave