bottle cap

American  

noun

1. a device for closing or sealing a bottle, especially a metal cover with a cork gasket fitting tightly over the mouth of a glass or plastic bottle, held in place by crimping the edge of the cap over the lip or flange of the bottle.

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Etymology

Origin of bottle cap

An Americanism dating back to 1925–30

Example Sentences

Even the smallest amount of standing water, for example in a bottle cap, is enough space for Aedes aegypti to lay eggs, Brannon said.

From Los Angeles Times • Feb. 27, 2026

To protect the quality of your oils, store them away from light and heat and always replace the bottle cap tightly.

From Seattle Times • May 20, 2024

“During our experiments with tactile sensors,” he says, “we found that tasks like unstacking cups and opening a bottle cap were significantly harder—and perhaps more useful—than rotating objects.”

From Scientific American • Jul. 31, 2023

They gave him water to drink from a bottle cap before pulling him out of the wreckage, nearly 45 hours after the major quake.

From BBC • Feb. 8, 2023

Throw in a bottle cap collection, and your day is made!”

From Each Little Bird That Sings by Deborah Wiles