| 摘要 |
The present invention improved the defect of the existing bottle cap not to keep carbonated water fresh for a long time. This present invention can keep carbonated water fresh for a long time by the protection of the leakage of carbonic acid gas from the bottle. For the purpose of this usage, there is a body of revolution with the convex surface and groove for revolution between the cap and bottleneck. So, carbonic acid would not be leaked by the protection of the body of revolution when the bottle is not inclined. And the carbonated water could be poured by the rotation of the body of revolution when the bottle is inclined to pour carbonated water. |
