Patent ID: 8491854

Claim:
A test tube insert having a longitudinal axis from a first end to a second end, the test tube insert comprising: a flange portion having an upper surface and a lower surface in opposition to one another, a width of the lower surface in a direction perpendicular to the longitudinal axis, a height in a direction parallel to the longitudinal axis, the height between the upper surface and the lower surface being less than the width of the lower surface, and the flange defining a first central opening concentric with the longitudinal axis; an annulus portion extending integrally downward from the flange portion, the annulus portion comprising a fenestrated wall portion and a floor portion defining a second central opening; and a test tube body portion, the body portion extending integrally downward from the floor portion of the annulus portion, the second central opening concentric with the longitudinal axis, the second central opening forming a mouth of the small test tube body.