Just add hot water to signal for the Caped Crusader with this incredible The Batman Heat Change Mug. The 300ml (10.1 fl oz) capacity ceramic mug features a heat-sensitive colour-changing design with various images including Batman, the redesigned Batmobile from the 2022 movie, and Gotham city. Simply fill the mug with tea, coffee, or any hot drink of your choosing and watch the design transform and the background shift from black to red before your eyes as it heats up. The Batman Heat Change Mug makes a great addition to any Batman or DC Comics fan\'s mug collection. Not suitable for dishwasher or microwave use.