| 摘要 |
A container (600) having an open top and being adapted to be filled with liquid, wherein a vacuum is prevented from being formed within the container (600) when inverted, comprising a receptacle (602) adapted to contain a quantity of liquid, a vent unit adapted to fit within the receptacle (602) comprising a reservoir tube (614) having an upper (622) and lower (624) portion, the reservoir tube (614) having a proximal first end adjacent the top of the container (600) and an open second end projecting sufficiently downwardly in the container (600), wherein the vent unit has an airway between the outside of the container (600) and a point in the reservoir tube (614), a vent tube (630) having a distal end having an opening (632), the vent tube (630) projecting downwardly into the upper portion of the vent tube (630), and an airway (616) extending from outside the container (600) through the vent tube (630) and into the vent unit.
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