| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid container capable of keeping carbonated beverage including carbon dioxide such as carbonated water, soda, lemon soda or effervescent beverage such as beer. SOLUTION: At a surface facing the inside of the container main body 1 of a cap 20, a pressure regulating port 25 for lowering internal pressure in the main body 1 when the internal pressure is raised is formed. In the inside of the cap 20, a pressure releasing passage 26 communicating with the pressure regulating port 25 and an exhaust port 27 is formed. A pressure regulating valve 28 is provided in the pressure releasing passage 26. When the internal pressure in the container 1 is equal to normal pressure, this pressure regulating valve 28 closes the pressure regulating port 25 and when it is higher, the pressure regulating valve 28 opens the pressure regulating port 25. |
