Bottle cap
Top for holding liquid inside a bottle / From Wikipedia, the free encyclopedia
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This article is about the caps of bottles. For the Nestlé candy, see Bottle Caps (candy). For the bottle cap top game, see Pogs.
"Bottletop" redirects here. For other uses, see Bottletop (disambiguation).
A bottle cap or bottle top is a closure for the top opening of a bottle. A cap is sometimes colorfully decorated with the logo of the brand of contents. Plastic caps are used for plastic bottles, while metal with plastic backing is used for glass; plastic caps are commonly made from polyethylene or polypropylene,[1] while metal caps are usually either steel or aluminum.[2] Plastic caps may have a pour spout. Flip-Top caps like Flapper closures provide controlled dispensing of dry products. Caps for plastic bottles are often made of a different type of plastic from the bottle.
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A cork is another type of closure for the top of a bottle.