The Tree in Water by WeiQichong from china

Water, life and nature----are closely linked with each other.
Although the principle of saving water is known to everyone, sometimes people seem to lack sense of saving it in real life. “The Tree in Water” is such a tasteful design for strengthening this sense. Coated with temperature-sensed material, the exterior wall of the cup will show the following variation: due to the temperature-sensed character, the green leaves on the “tree” grow slowly as the water is poured into the cup while they gradually fall as the water inside is drunk, until they totally disappear.
Through this interesting visual variation, people are vividly informed of the fact that plants are the most important ecological resources, which are seriously related to our life and need the nourishment of water the same as human. In order to live in green, we are supposed to save water.