A portable fluid container having an inlet and an outlet for allowing fluid to flow into and out of the portable fluid container. The outlet is completely covered and sealed by a selective filter which only allows gases and minute particles to pass therethrough while retaining liquid and other larger...http://www.google.com/patents/US5386735?utm_source=gb-gplus-sharePatent US5386735 - Apparatus for collecting a fluid sample from a patient and container for storing the same
