| 摘要 |
<p>The present invention relates to a bottle cap. A bottle cap blocking an inlet on an upper portion of a bottle includes a cylindrical body portion (10); and a cap portion (20) covering the body portion (10) to be coupled to vertically be moved. The present invention functions as a bottle cap blocking an inlet of a bottle, and includes a cap portion at an upper portion of the bottle cap configured to be shrunk or spread, thereby improving an outer appearance. Also, the lower portion of the bottle cap is sunk in liquid inside the bottle, such that heat is easily transferred outside the bottle, thereby minimizing loss of carbonic acid.</p> |
