| 摘要 |
A bottle includes male threads formed on an outer bottom surface; a hollow protrusion formed on a base of the bottle protruding inwardly toward an interior of the bottle and having an opening formed on a top of the hollow protrusion; a silicon rubber layer disposed on a bottom of the bottle having an elastic protrusion snugly received in the hollow protrusion and a slit formed on a top of the elastic protrusion; a base casing having female threads formed on its inner surface engageable with the male threads of the bottle and having a vent formed in a central portion of the base casing; and a disposable liner bag having a reinforced wall made of silicon rubber formed on a central location of the bag, having a cut positioned at the center of the reinforced wall. The slit on the elastic protrusion and the cut on the liner bag remains closed in normal (non-suction) condition, thereby preventing the milk or liquids from dripping out. The cut of the liner bag is axially aligned with the opening of the hollow protrusion, the slit of the elastic protrusion of the rubber layer, and the vent of the base casing. Once the bottle is inverted and the nipple is sucked on, the slit and the cut opens to a certain amount to let the air flow into the bottle and the bag. Thus, milk flows out of the nipple continuously during suction.
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