Screwcapped

Screwcapped is a term used in packaging and manufacturing to describe containers that seal with a screw-cap closure. It can function as both an adjective (screwcapped bottles) and a past-tense verb (to screwcapped a bottle). The term derives from the action of twisting a threaded cap onto a corresponding neck finish.

Caps are typically made of plastic or metal and may include liners to improve seal integrity. Many screw caps incorporate tamper-evident bands that break away or align with the neck when first opened, helping to deter resealing after opening.

The closures are compatible with a range of contents, including beverages, sauces, pharmaceuticals, and cosmetics, and are used on polypropylene or polyethylene terephthalate containers, glass bottles, and some metal cans.

Advantages of screwcapped closures include reliable sealing, resealability, low cost, and ease of automated capping lines. They are often recyclable and can help reduce oxygen ingress, extending shelf life in many products.

Drawbacks include consumer perceptions of premium quality, particularly in wine, where cork closures are traditionally favored, and the potential need for liners to ensure a tight seal with certain products.

In recent decades, screw-cap closures have gained widespread acceptance in many markets, with regulatory guidance focusing on tamper evidence, child resistance, and compatibility with product contents. Screwcapped packaging is a common descriptor in packaging catalogs and industry reports.