Bottle mouth type: common bottle mouths are 28 (1810 and 1881), 30-25, 29-25, 38.

The 28mm screw thread with 28mm diameter is generally used for water, carbonated beverages, juice, tea, and carbonated beverages.

The outer diameter of the 30-25 mouth bottle thread and the inner diameter of the bottle thread are 30mm/25mm, respectively, and the height of the bottle mouth is 18.5mm, which is generally used for water bottles.

The outer diameter of the 29-25 mouth bottle thread and the inner diameter of the bottle thread are 29.4mm/25mm, and the height of the bottle mouth is about 12.5mm. It is a new lightweight bottle mouth that has appeared in recent years and is generally used for water bottles.

38 mouths are generally used for functional drinks, mixed juices, etc. The size of the bottle mouth varies greatly.