1. Texture sense - the vertical groove shape increases the memory point of the product and opens up the homogenization of the market products
2. In terms of form - hanging holes increase the added value of the product.
3. Color matching according to different tastes
4. Cigarette mouthpiece-injection molding/smooth surface-mold stretch molding/
5. Body - sandblasting anodizing
6. Large mouthfuls: one-time large mouthfuls are more popular in the United States