Beer bottle caps have 21 teeth.

Beer bottle caps usually have 21 teeth, and the main purpose of these teeth is to help open the cap and prevent the cap from falling off during opening. In addition, the number of teeth on a beer bottle cap provides identification and counting for the manufacturer. The number of teeth on a beer bottle cap not only facilitates the opening of the cap, but also provides manufacturers with a convenient and reliable way of packaging and counting.

The number of teeth on a beer bottle cap effectively controls the size and shape of the cap during the production process, ensuring that the cap fits correctly over the mouth of the beer bottle and that the cap is tight. By counting the number of teeth patterns, manufacturers can quickly and accurately determine the number and arrangement of caps, which facilitates counting and packaging during the production process.

Main materials for beer bottle caps

Metal bottle caps are usually made of lightweight and well-processed materials such as aluminum alloys or tin alloys, which have good sealing performance and long service life. In the production of beer bottle caps, the metal material is processed to form teeth of different shapes and sizes, which can help open the cap and prevent it from falling off during the opening process.

Plastic bottle caps are usually made of polyethylene, epoxy resin and other materials. These plastic materials have better sealing properties and durability, and are relatively inexpensive, so they are also widely used in beer bottle caps. Plastic bottle caps come in a variety of shapes and sizes and can be customized for different beer brands and types to meet different market demands.