In terms of level, cosmetic tubes are divided into single-layer, double-layer and five-layer tubes, which are different in pressure prevention, penetration resistance and hand feeling. For example, the five-layer tube consists of outer layer, inner layer and two adhesive layers. There is also a barrier layer. Double-layer pipes are more common, and single-layer can also be used in medium and low-grade In terms of caliber, the diameter of the cosmetic tube is 13#—60#. When selecting a tube of a certain diameter, different capacity characteristics are marked with different lengths. The capacity of 3ml-360ml can be adjusted. 60ml or less commonly used below 35# caliber, 100ml, 150ml usually use 35#-45# caliber, 150ml or more capacity requires 45# or more caliber. In terms of production process, round tubes, elliptical tubes, flat tubes, and ultra-flat tubes are more common. Flat tubes and super flat tubes are new types of tubes that have been produced in recent