Puli is a double-cap safety pill bottle. The outer cap is connected to the inner cap by tracks. In initial status, the outer cap can be rotated freely while the inner cap will not move. For adult, by pushing the outer cap, two caps will engage by the protrusion and depressions and can be rotated synchronously to open the bottle. For children, it is difficult for them to push the outer cap due to the narrower channel design, thus making the bottle safe.

Qidan Yan, currently studying at Jiangnan University as an undergraduate in industrial design. As a student who has just entered the design field, she showed great curiosity about simple but delicate structure, and combined with insight into the details of life to create designs. She believes that design is for a better life, then design should be simple and easy to be understood by most people. Based on this understanding to make ingenious innovations, design stand out.