Magic mug
From Infogalactic: the planetary knowledge core
File:Yahoo answers cup.JPG
A promotional magic mug.
A magic mug is a mug that, when filled with a hot liquid, changes colour. This effect is created by using a special oxidized ink.[1]
These mugs are often manufactured and sold as memorabilia. For example, a mug may reveal a picture of the town or monument where it was sold. They are sometimes given away to promote organisations. Customers can also have their own photographs printed on the mugs.
See also
References
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- ↑ "Paris Opera Rises on Bunker Hill Setting the stage for opening of `The Phantom'", Janice Arkatov, LA Times, 30 April 1989
