Harry Potter Muggle Worthy Heat Change Mug

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When cold this mug is completely Muggle worthy, no magic to be seen. However pour in your tea/coffee and watch the magic happen as a creature appears through the keyhole. When cold /room temperature: blank keyhole under the text "muggle worthy"When hot drink added: creature eye appears in keyhole and text disapears Official Harry Potter Licensed Merchandise (Note: whole mug does not change colour - picture depicting two colour variations) Show more