Abstract: The present invention is a collection container assembly comprising a container having a microporous partition so as to reduce the internal volume of the container wherein the external dimensions of the container are substantially the same as a standard-sized blood collection tube but with a reduced internal volume.

Abstract: The present invention is a specimen collection container assembly comprising an inner tube within an outer tube wherein the external dimensions of the inner tube are less than the external dimensions of the outer tube and the internal volume of the inner tube is less than the internal volume of the outer tube. The assembly of the present invention provides a means for adapting a full-draw or standard-sized blood collection tube to handle a reduced internal volume for handling by equipment configured to handle standard-sized blood collection tubes having standard external dimensions.