What Are Glass Bottle Caps

Glass bottles are widely used in food, beverage, cosmetics and other industries due to their environmental protection, transparency and good sealing. As an important part of glass bottles, bottle caps not only bear the functions of sealing and preservation, but also affect the product's user experience and appearance to a certain extent.

Common types of glass bottle caps

Screw caps

Screw top glass bottles are one of the most common types of glass bottle caps. The principle is to tighten and unscrew the threads on the bottle caps and the threads on the bottle mouth. The screw cap has good sealing performance and can effectively prevent the leakage of contents and the entry of external air and moisture.

It is suitable for all kinds of liquid and semi-liquid products, such as beverages, sauces, honey, etc. Its opening and closing operation is simple and convenient. Consumers can use it easily without the help of additional tools. It is very suitable for products that are frequently used in daily life.

Snap-on caps

Snap-on caps mainly rely on the snap-on structure inside the cap to tightly fit with the edge of the bottle mouth to achieve a sealing effect. This type of bottle cap has a unique opening and closing method. You only need to gently press or pull a specific part to open or close the bottle cap, which is both fun and convenient to use.

Snap-on caps are often used for some products that need to be quickly taken, such as children's medicines and seasoning bottles. In addition, snap-on caps can be designed with special structures that prevent children from opening to improve product safety and prevent children from accidentally touching or eating.

Push-on bottle caps

Press-on bottle caps are equipped with a special valve device. When the top of the bottle cap is pressed, the valve opens and the contents can be squeezed out; after releasing, the valve automatically closes, effectively preventing the contents from flowing back and leaking. This type of bottle cap is particularly suitable for toiletries such as lotions, facial cleansers, and shower gels. It can accurately control the amount of use, avoid waste, and keep the product hygienic.

Common sizes of glass bottle caps

The size of glass bottle caps will vary according to the capacity, purpose and product design requirements of the bottle. Common cap diameter sizes are:

28mm screw cap: Commonly used in small cosmetic bottles, oral liquid bottles, etc., suitable for small-capacity products, small and exquisite.

33mm: More common in condiment bottles and small beverage bottles, moderate size, easy to grasp and open.

38mm: Suitable for medium-capacity beverage bottles and sauce bottles, one of the more common sizes.

43mm: Common in some large-capacity beverage bottles and oil bottles. The larger diameter makes the contact area between the bottle cap and the bottle mouth larger and the sealing better.

53mm and above: Mostly used in large-sized containers, such as large barrels of edible oil, alcohol, etc., which can withstand greater pressure and weight.

In addition to the diameter, the height of the bottle cap also varies depending on the type and function. For example, the height of the screw cap is generally between 15-30mm; the height of the snap cap is usually between 10-25mm; and the height of the push-on bottle cap may be between 20-40mm due to the complex internal structure.

Original source: https://www.alubottlecaps.com/a/what-are-glass-bottle-caps.html

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