Bass Fishing Magic Color Changing Coffee Mug

Bought for my 11 year old grandson for his hot chocolate. He's an avid bass fisherman. He took it home, used the cup & text me a picture. So I'm guessing he liked it.

I washed this in my dishwasher when I got it and now it will not return to the image it should when the cup is cold.

The mug was as advertised with beautiful color appearing when you pour hot liquid.