The threaded cover is a plastic cover or a metal cover.
The surface of the bottle shoulder is a concave and curved curved surface.
The height ratio of the bottle body to the bottle shoulder is 1:1 ~ 7:3.
Further, the height of the bottle body is 131 ~ 200mm, the height of the bottle body is 76 ~ 150mm, the height of the bottle shoulder is 65 ~ 120mm, and the effective capacity of the bottle body is 300 ~ 550ml, the inner diameter of the bottle mouth is 24 ~ 46mm, the inner diameter of the bottle body is 45 ~ 70mm, and the distance between the outer thread and the bottle mouth is 3 ~ 10mm.