Beer Bottle Cap Manufacturers Introduce Why The Bottle Cap Is 21 Teeth?

Now the 21 teeth of the beer bottle cap are manufactured according to the internationally accepted German standard DIN6099. This standard specifies not only the diameter of the neck, but also the shape of the edge of the cap and the material of manufacture.

There are two main bases for the requirements for beer cap size: 1. tightness; 2. Degree of bite.

This means that the number of pleats in each beer cap is proportional to the contact area of the bottle mouth, and the wavy closure on the outside of the cap can increase friction and facilitate opening. 21 teeth is a compromise between these two requirements.

Why is it 21, in fact, it is related to the bottle driver, opening a beer bottle is actually a science, to pay attention to safety and convenience, beer because it contains a lot of carbon dioxide, so don't be careful when opening, if the air pressure inside is not uniform, it is easy to hurt the hand, don't shake the beer violently, don't burst when opening the bottle. Therefore, how to open beer bottles safely and conveniently needs to be considered when designing.
In order to find a suitable way to open the cap quickly, the designers of beer bottle closure manufacturers at that time determined that it was easy and safe to open when 21 sawteeth were constantly modified. So this is today's 21 serrated beer bottle caps. Because this design was recognized, it was soon applied in other beverage packaging, such as glass bottles of Coke and Sprite caps.