Just like Lizzie transforms from normal crocodile to giant, raging beast, this mug transforms into a giant raging … no, that’s not right. This mug transforms from black to reveal the hidden image of Lizzie when hot liquid is added. *While this mug may be used in the dishwasher or microwave, for the longest lasting, highest quality product, we strongly recommend against it. Official Morphing MugsTM sold on Amazon.com should only ship from established sellers within the USA. Other mugs may be counterfeit.