The "luminous cup" is made of white jade. The cup is as thin as paper, bright and transparent, and it can shine by itself at night, and it will shine after drinking. This is a rare treasure. In addition, William Wang, a poet in the Tang Dynasty, wrote a poem "wine in a glass" in Liangzhou Ci, so "wine in a glass" was also used to describe wine. Although it is called "night light", not all wine glasses can glow by themselves at night, only a few special materials can, so don't easily treat ordinary glasses as night light cups.