1.Pour hot water in the mug, the picture changes magically 2.Creative Christmas gift 3.Customized design 4.1000pcs in 7days MANUFACTURERWe are the leader in designing and manufacturing superior color changing mugs. We have committed color changing mugs for 12 years and applied patents for some of our products. Our commitment to do this work reflects the same determination to improve the life. ...