Add a creepy surprise to your next coffee break with this IT the movie inspired Pennywise Heat Change Mug. The 350ml (11 fl oz) ceramic mug reveals a terrifying twist - just add hot water and watch as the black TV screens transform to show Pennywise the Clown. It's perfect for bringing a spooky twist to your tea, coffee, hot chocolate or favourite drink. Not suitable for dishwasher or microwave use. The Pennywise Heat Change Mug is a must-have for any horror movie fan's kitchen cupboard.