So - that's very nice!

At first I thought "oh well" and then "aha!" The color change is very clear between vigorous green and bright yellow. One can play nicely when pouring and thereby create patterns that arise and pass away slowly. After the first pour the heat and allow the yellow comes through slowly; slowed down on the ground by the cool saucer and finally at the thicker and more distant from the content Henkel.

When drinking is "cooling rings" form, before leaving the cup after a few sips and accesses again after some time. If you put your finger on the no longer warmed by the contents Check out this cool slowly and draw the outline after. Drops evaporate on the outside of the cup and left green (cool) points that are slowly disappearing. Since there is a tendency when drinking the cup (Note: while playing and so please do not get too ;-)) is also produced by oblique pattern.

Nice toy. Oh, and coffee / tea drink out of it you can bargain even :-)