Ventilation fluid supply cup

A ventilation fluid supply cup, comprising:

• a container, the container is arranged with a vent hole, the vent hole is closed by a valve, the valve comprises a valve housing arranged at a corresponding position of the container, the valve housing is arranged with a closing element, the valve housing comprises at least one hollow column protruding around a periphery of the vent hole, the hollow column is arranged with at least one vent opening, the closing element is arranged with a vent position matched with the vent opening, the closing element is capable of rotating along a circumferential direction of the valve housing;
• the vent opening and the vent position are in a connected state to make pressure between an inside of the container and an external environment balanced;
• the vent opening and the vent position are in a disconnected state to close the vent opening by a side wall of the closing element;
• and the closing element is arranged at the valve housing by a limiting mechanism or a locking mechanism.