Painted ear cup box, unearthed from Mawangdui, Changsha, square corner, height 12 cm. Diameter: external 19 cm, internal 16.5 cm. The lid is tightly buckled with the mouth of the child and the mother. There are 7 ear cups in the box, and the internal infrared rays are all black. Safe stacking and precise production. The design idea embodied in this object is a breakthrough in the modeling design of the Han Dynasty, which not only considers the convenience of use, but also reduces the space for placement. As a tableware, it has the advantages of hygiene and cleanliness. Similarly, there are many sub-boxes. In a big round box, there are many small boxes with different shapes, such as circle, square, rectangle, ellipse, semicircle, double diamond and so on. Small boxes are nested in a certain format, sometimes as many as nine or eleven. 1974 a multi-child lacquer box unearthed in Xu Xian county, Jiangsu province, contains 7 small boxes.