Closure (container)

Bottle Can

Closures

Bottle caps

File:Tylenol package - tamper resistant.jpg

Tylenol package - tamper resistant

Spray bottle

Erlat

Closure (container)

A closure is a mechanical device used to close or seal a container such as a bottle, jar, tub, or can. Closures are essential for maintaining the integrity of the contents, preventing contamination, and ensuring the product's shelf life. They come in various forms, including screw caps, snap lids, and cork stoppers.

Types of Closures

Closures can be broadly categorized based on their mechanism and application:

• Screw caps: These are threaded closures that screw onto the container's neck. They are commonly used for bottles containing beverages, medicines, and cosmetics.
• Snap lids: These closures snap onto the container and are often used for food storage containers and plastic tubs.
• Cork stoppers: Traditionally used for wine bottles, cork stoppers are made from the bark of the cork oak tree.
• Crimped caps: These are metal closures that are crimped onto the container, often used for beer bottles and soft drink cans.
• Child-resistant closures: Designed to prevent children from accessing the contents, these closures require a specific action to open, such as pressing down while turning.

Materials

Closures can be made from various materials, including:

• Plastic: Commonly used for screw caps and snap lids due to its versatility and cost-effectiveness.
• Metal: Often used for crimped caps and some screw caps, providing a strong and durable seal.
• Cork: A natural material used primarily for wine bottles, offering a traditional and effective seal.

Applications

Closures are used in a wide range of industries, including:

• Food and beverage: Ensuring the freshness and safety of consumable products.
• Pharmaceutical: Protecting medicines from contamination and ensuring proper dosage.
• Cosmetics: Preserving the integrity of beauty products and preventing leakage.
• Industrial: Sealing containers of chemicals and other industrial materials.

Related Pages

• Bottle
• Jar
• Can
• Screw cap
• Snap lid
• Cork stopper
• Child-resistant closure
• Plastic
• Metal
• Cork

See Also

• Packaging
• Container
• Seal (mechanical)