The Bat Signal on This Forbidden Planet Batman Mug is Sensitive to Heat

 - Jul 9, 2014
References: forbiddenplanet & geekalerts
Like the bat signal appears in this sky, the logo on this Batman mug shows up when you get into hot water. The heat-sensitive coffee cup is black with the Gotham City skyline printed along the circumference. But when a hot liquid is poured into it, the bat signal will become visible on the side.

Available from Forbidden Planet, the Batman Heat Change Mug lets you channel your inner superhero. As the Caped Crusader is called to action, your coffee, tea or other hot beverage will prepare you for the task ahead. Without using any super powers, this Batman mug is sure to make everything taste better as well.

This product makes a great gift for any Bruce Wayne fans in your life.