In brightest day, in blackest night… Actually, you just need hot liquid to call forth Hal Jordan as the Green Lantern on this Green Lantern In Brightest Day Heat-Sensitive Morphing Mug! The exterior of this 11 oz. mug transforms from black as hot liquid is added, revealing the hidden image in full vivid colors. Makes a great gift for fans of Green Lantern and DC Comics. Hand wash only. Not dishwasher safe. Do not microwave.