"It's a fine line between watching over and stalking". This 11 oz. Constantine Devil You Know Morphing Mug transforms from black to full color as hot liquid is added! Watch as the heat-activated process reveals a hidden image of John Constantine and a quote from the 2014 TV series in vivid colors. Hand wash only. Not safe for dishwasher or microwave. Measures approximately 3 3/4-inches tall x 3 1/8-inches in diameter.