| 摘要 |
A bottle cap having a sealing part inside the cap is provided to open the entrance of the bottle automatically by dropping an elevation element when a user turns a cover around, and to allow the user to drink beverage through the elevation element. A bottle cap comprises a body(16); an elevation element(18) inserted into the body to be movable in a vertical direction to open or close the entrance of the bottle; and a cover for protecting the entrance and moving the elevation element vertically as the entrance is rotated in a clockwise/counterclockwise direction. The body includes a mount portion(24) in a cylindrical shape to be mounted at the entrance of the bottle in a detachable manner, and an elevation element guide(26) extended from the mount portion in an upward direction to help the vertical motion of the elevation element. The body further includes at least one reinforcing rib(23) formed on the outer face of the body in a vertical direction; and at least one reinforcing rib(23a) formed to be concentric with the elevation element guide.
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