Detective Jim Gordon is a good man finding himself at odds in a city full of crime. He is determined to clean up the city, even if he is the only one willing to take a stand. Show the future commissioner some much needed support with this unique mug. This 11oz transforms from black as hot liquid is added. Watch as the heat-activated process reveals the hidden image in full vivid colors. While this mug may be used in the microwave, for the longest lasting, highest quality product, we strongly recommend against it. Hand wash recommended.