"A bottle cap or bottle top seals the top opening of a bottle. A cap is typically colourfully decorated with the logo of the brand of ...
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beverage. Plastic caps are used for plastic bottles, while metal with plastic backing is used for glass; the metal is usually steel.[citation needed] 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." - (en.wikipedia.org 17.09.2020)