Wacky Races – Muttley – Morphing Mugs Heat Sensitive Mug – Ceramic Colour Changing Heat Reveal Coffee Tea Mug

Do you hear that snickering sound? Sounds so … mischievous. For fans of the old Wacky Races and the new, this super bright, officially licenced mug features Muttley the dog and his most famous quote, “Heheheheh.” The exterior of this officially licenced 11oz mug transforms from black as hot liquid is added, revealing the hidden image in full vivid colours. While this mug may be used in the dishwasher or microwave, for the longest lasting, highest quality product, we strongly recommend against it. PLEASE DO NOT MICROWAVE THIS MUG. HAND WASH ONLY. Due to the need for hot liquid to transform the mug, this mug might not be suitable for young children.