Morphing Mugs Harry Potter – Marauder’s Map – I Solemnly Swear – 16 oz Large Ceramic Heat Sensitive Clue Mug – Full image revealed when HOT liquid is added

This mug appears to have little secrets to hide, swearing to be up to no good. However, ready your wands (or your hot coffee) and reveal the hidden design! Add hot liquid and watch as the Marauder’s Map is revealed as though you had said the words, “I solemnly swear I am up to no good.” Authentic Morphing Mugs Heat Sensitive Clue Mug This is the real deal. This is the legit Morphing Heat-Sensitive Clue Mug by Trend Setters Ltd. This mug looks great sitting out on display for those who like to show off their collection. Pouring hot liquid enhances the design with a surprise reveal. Perfect for gifting or collecting, drinking or displaying!