Tempt Batman out of the shadows with a good brew thanks to this Batman Heat Change Mug! Perfectly suited for fans of the iconic Caped Crusader, the mug sees the comic book hero emerge from the darkness whenever a hot drink is added. With a 300ml capacity and black heat changing decal, this is a great gift even for the Dark Knight himself. Batman is the legendary comic book hero from DC Comics. First appearing in Detective Comics in 1939.