A screw cap or closure is a common type of closure for bottles, jars, and tubes.
⭐ Core Definition: Screw cap
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👉 Screw cap in the context of Jar
A jar is a rigid, cylindrical, or slightly conical container, typically made of glass, ceramic, or plastic, with a wide mouth or opening that can be closed with a lid, screw cap, lug cap, cork stopper, roll-on cap, crimp-on cap, press-on cap, plastic shrink, heat-sealed lidding film, an inner seal, a tamper-evident band, or other suitable means. The English word "jar" originates from the Arabic word jarra, which means an earthen pot or vessel.
In this Dossier
Screw cap in the context of Tamper-evident band
A tamper-evident band or security ring serves as a tamper resistant or tamper evident function to a screw cap, lid, or closure. The term tamper-proof is sometimes used but is considered a misnomer given that pilfering is still technically possible.
A security band can be integrated with the cap or can be a separate package component. It is a plastic or metal structure around the circumference (usually) of the closure that is often found attached below a closure in bottles, jars, and tubs.
Screw cap in the context of Moving parts
Machines include both fixed and moving parts. The moving parts have controlled and constrained motions.
The term excludes fluids that pass through the machine, such as fuel, coolant or hydraulic fluid, as well as mechanical parts (such as locks, switches, nuts, bolts, and screw caps for bottles) which are moved only to reconfigure the machine. A system with no moving parts is described as "solid state".
Screw cap in the context of Bottle cap
A bottle cap or bottle top is a common closure for the top opening of a bottle. A cap is sometimes colorfully decorated with the logo of the brand of contents. Metal caps with plastic backing are used for glass bottles, sometimes wrapped in decorative foil. Metal caps are usually either steel or aluminum, and of the crown cork type. Flip-top caps (like flapper closures) preceded such caps.
Plastic caps are used for plastic bottles, functioning as screw caps, or plastic caps may have a pour spout rather than being detachable. Plastic caps are commonly made from polyethylene or polypropylene, and caps for plastic bottles are often made of a different type of plastic from the bottle.