Fill the teacup with hot water from the thermos. But be careful to not letit overflow. How can you turn it off? Be careful not to scald yourself.
This work was produced by Karakuri Creation Group’s craftsmen, from a selected idea of “5th Karakuri Puzzle Idea Contest”.

Original idea by Syunsuke Ohno
Hand-crafted by Yoh Kakuda (Karakuri Creation Group)