| 摘要 |
A bottle with male threads on the outer bottom surface and a protruding surface on the base thereof; a silicon rubber layer provided with an elastic protrusion which has a slit on the top; a base casing with female threads on its inner surface and a minute vent centered thereon. The slit on the elastic protrusion remains closed in normal (non-suction) condition thereby, preventing the milk or liquid inside the bottle from dripping out. Once the bottle is inverted and the nipple is sucked, the slit opens a certain amount to let the air flow into the bottle. Thus, milk flows out of the nipple continuously during suction.
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