Screw cap

Screw cap

A screw cap or closure is a common type of closure for bottles, jars, and tubes.

Common screw closures: Plastic bottle with plastic screw cap, Dispensing closure for salad dressing (with inner seal), Break-away closure for syrup, Dispensing pump closure, Dispensing closure (with inner seal), Spray pump, Metal closure on glass jar, Child resistant closure, Cap on toothpaste, Measuring cap
A "sports cap", which appears on many water bottles, seen in closed configuration at left an in open configuration at right, availing the water to pass around the central blue piece.



A screw closure is a mechanical device which is screwed on and off of a "finish" on a container. Either continuous threads or lugs are used. It must be engineered to be cost-effective, to provide an effective seal (and barrier), to be compatible with the contents, to be easily opened by the consumer, often to be reclosable, and to comply with product, package, and environmental laws and regulations. Some closures need to be tamper resistant and have child-resistant packaging features.

Wine Industry

Its use as an alternative wine closure is gaining increasing support as an alternative to cork for sealing wine bottles. A screw cap is a metal cap that screws onto threads on the neck of a bottle, generally with a metal skirt down the neck to resemble the traditional wine capsule ("foil"). A layer of plastic (often PVDC), cork, rubber, or other soft material is used as wad to make a seal with the mouth of the bottle.

Sake industry

Sake bottles are almost universally closed with screw caps (some are packed in barrels, or novelty bottles).


See also

External links

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Look at other dictionaries:

  • screw cap — noun : a cap that screws onto a threaded container finish (as on a bottle or jar) * * * a cap designed to screw onto the threaded mouth of a bottle, jar, or the like. [1870 75] * * * screw cap noun A lid that screws onto a container • • • Main… …   Useful english dictionary

  • screw cap — srieginis lizdas statusas T sritis radioelektronika atitikmenys: angl. screw base; screw cap; screw socket vok. Edisonfassung, f; Schraubsockel, m rus. резьбовой цоколь, m pranc. culot à vis, m; culot Edison, m; culot fileté, m …   Radioelektronikos terminų žodynas

  • screw cap — užsukamasis dangtelis statusas Aprobuotas sritis talpyklės, uždoriai, vartojimo įtaisai apibrėžtis Tuščiaviduris cilindrinis įtaisas su sraigtiniu sriegiu talpyklei užsukti. atitikmenys: angl. screw cap vok. Schraubdeckel pranc. bouchon à vis… …   Lithuanian dictionary (lietuvių žodynas)

  • screw cap — a cap designed to screw onto the threaded mouth of a bottle, jar, or the like. [1870 75] * * * …   Universalium

  • screw cap — noun The cap of a bottle or jar which screws onto the threaded lip of the container. Syn: screw top …   Wiktionary

  • screw cap — noun a round cap or lid that can be screwed on to a bottle or jar. Derivatives screw capped adjective …   English new terms dictionary

  • screw cap — n. cap that screws on the threaded mouth of a jar or bottle …   English contemporary dictionary

  • screw cap — /ˈskru kæp/ (say skrooh kap) noun a cap for a bottle which is screwed on and off …  

  • screw-cap vial — a vial with a threaded plastic cap, often used to store parts of a dissected specimen or very small specimens that would be lost in a large jar …   Dictionary of ichthyology

  • screw — n. & v. n. 1 a thin cylinder or cone with a spiral ridge or thread running round the outside (male screw) or the inside (female screw). 2 (in full wood screw) a metal male screw with a slotted head and a sharp point for fastening things, esp. in… …   Useful english dictionary

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