The bottle's design combines the concept of Yin in Tai Chi, which reminds people of the moon and water. From the perspective of the moon, the crescent is the main element. The lid is in the shape of the crescent. In terms of water, the shape of drops on green leaves or the skin is adopted. Combining these concepts, the product is designed as a special shape that can be put vertically or horizontally: when put horizontally, it looks like a drop; when put vertically, it presents the moon's elegance. The bottle is a dark green that is associated with the night, which further reflects the concept of Yin in Tai Chi.