Morphing MugsHarry Potter – Hogwarts School for Witchcraft and Wizardry – Crest – 16 oz Large Ceramic Heat Sensitive Clue Mug – Full image revealed when HOT liquid is added

My wife it and is a fan of Harry Potter

Very cool product. Bought it for a friend who loves Harry Potter & coffee

Pretty cool transformation. You can see some color variation when cool, but it really does pop when filled with hot liquid. Great gift!

I'm a single father with 2 teenagers, and I bought this mug as a gift for my 13-yr-old daughter, who is a huge Harry Potter fan. She absolutely loved it. Now when she's making tea or hot chocolate, I get a little extra smile and sometimes even a kiss on the cheek and a "I love you Dad" which isn't too common with teenagers these days! By the way, the mug works exactly as it should -- black when cold, visible map when hot. I'd definitely recommend this if you need a gift for your own Harry Potter fan.

A nice novelty but it scratches so easy that it would not last at our house for dally use.

Definitely a good gift.

Good size for coffee lovers, and looks just like the pictures

It was really fun to watch It. I definitely recommend getting one of these amazing finds.It makes your heart beverages more exciting.! You are welcome