This is one of those odd mugs that I can't seem to research. It's a beautiful mug with a colorful square puzzle on the left side of the mug. The rest of the mug is blank.
When hot liquid is added to the mug, one of the dark purple puzzle pieces in the upper left corner of the puzzle clears to show the phrase "CPM KNOWS MEDIA." I cannot find any CPM Media (other than the definition of CPM as "cost per million.") I can only guess that CPM Media was a company that dealt in advertising of some sort and gave this mug to their customers.
The colors are bright and the color change is complete, making this a great mug in the collection.
DESIGN: 1 Sided
THERMOCHROMIC: 1 Color
TYPE: Corporate (?)