主权项 |
1. A nail polish bottle, comprising:
a bottle body; a cap including a disc portion having a center hole and a plurality of air holes formed in the disc portion, the cap having a discharge passage disposed above the center hole and external-air introduction grooves in flow contact with the air holes of the disc portion; and a pressure opening and closing valve mounted to the disc portion such that a skirt portion of the valve sits below the disc portion and such that a top of the valve is above the disc portion, when internal pressure in the bottle body is increased by squeezing the bottle, the skirt portion presses against the disc portion to close the air holes and the top of the valve opens allowing nail polish to flow through the discharge passage if the bottle is upside-down, and when the internal pressure is restored by releasing a squeezing force, the skirt portion moves away from the disc to open the air holes and the top of the valve closes to block polish from escaping through the discharge passage. |