| 摘要 |
A housing has a chamber for retaining fluid, a distal end portion of the housing having a passageway for communicating with the chamber. A venting element communicates between the chamber and the exterior of the housing, for allowing air to enter the housing as fluid leaves the chamber through the passageway. The venting element includes an air-permeable liquid-impermeable element positioned to allow gases passing through the venting element to pass through. The element is porous and capable of developing sufficiently high surface tension under contact to serve as a barrier against liq. passage during normal use of the container assembly. A stopper is slidably positioned in fluid tight engagement inside the housing.
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