This is a seriously sinister heat change mug featuring the most infamous Arkham Asylum inmate, The Joker. His iconic logo is shown on the left with the Joker himself depicted on the right hand side whilst the mug is cold. When hot water is added his horrifying laughter pops up in green alongside the warning labels 'extremely dangerous' and 'certified insane'. This heat activated mug is shipped in a fully branded box, which showcases the hot and cold designs as well as the DC Comics and iconic Batman logo too. It's the perfect gift for any fan.