Whatever Your Mood, the Magic Cup or Color Changing Mug is Amusing

Rings are one thing but when the same chameleon idea is applied to mugs, cups and steins, the magic effect has its ad driven faculties.

The stadium cup for instance can hold beer, water, soft drinks, etc. and when cold water is added, the color of the exterior morphs in color and reveals an imprint. We are interested in knowing your success with these items. Please comment with a link to an image perhaps. Thank you.