Officially licensed Harry Potter Merchandise by Half Moon Bay

• Add hot liquid to the mug to reveal Harry's stag patronus

• When cold, the mug features the words 'Expecto Patronum'

• Capacity 400ml - 12.5 (w) x 10 (h) x 9.5 (d) cm

• Not dishwasher or microwave safe

This Harry Potter Heat Changing Gift Mug features two designs. Cold, the mug shows the Expecto Patronum charm which wizards and wizards can cast when they need protection from Dementors. When hot liquid is poured in, the mug reveals Harry's stag Patronus on the front and a Dementor watching from the sky on the back. Once the drink is finished the mug returns to its original state as it cools.