| 摘要 |
PURPOSE: A bottle cap is provided to minimize release of carbon dioxide from a carbonated drink at home and to allow a last cup of the drink to be drinkable. CONSTITUTION: An opening and shutting knob(1-4) is mounted on a bottle cap(1-2) of a body(1-1) of a beverage bottle. When the opening and shutting knob is located in the middle of the bottle cap, connection between a bottle cap hole A(1-3) and a bottle cap hole B(1-5) is blocked by the opening and shutting knob, and when the opening and shutting knob is pushed to a side, the bottle cap hole A and the bottle cap hole B are connected.
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