Biological specimen collection system

A biological specimen collecting system for holding a biological specimen in a sustained sealed environment, the biological specimen collecting system comprising:

• a container for holding the biological specimen, the container being of circular cross section, the cross section of the container being radially symmetric in each plane which is orthogonal to the center line of the container, the interior surface of the sidewalls of the container sloping downwardly and inwardly from a point at or near the top of said container to a second point, the sidewalls being substantially vertical from the second point downward, the container having an outwardly extending thread region on the exterior surface thereof, and whereby once a cap having a sealing bead is screwed onto the container the entire periphery of the sealing bead engages the sealing surface, and
• a sealing closure cap mounted on the open end of the container and having a peripheral groove to receive the container rim, the peripheral groove being defined by inner and outer walls and a top, the outer wall of the cap having an inwardly extending thread region complementary to the thread region on the container for engagement therewith, the inner wall of the cap having a sealing bead extending radially outwardly, the entire periphery of the sealing bead contacting the sealing surface of the container to provide sustained sealing of the container by the sealing cap .