5 of 5 people found the following review helpful
2.0 out of 5 stars
Tetris heat change mug, 30 Mar. 2012
The design is very nice, but the quality is poor.
The heat change works reasonably well. When hot liquid is poured into the mug the blocks become coloured. However, when cold, they are dark grey rather than black, so they do not blend well into the black background.
Unfortunately, the quality of the paint is very poor. The paint comes loose in hot water. When I tried to wash it, some of the thin white lines rubbed off. It is also too easily scratched.