Fluids concentration cup assembly with hourglass shape

A biological fluids concentration cup assembly comprising:

• a rigid cup with an open top, an open bottom, and outer and inner walls;
• a lid configured to engage the open top and to removably receive a device selected from the group consisting of a syringe and a fluid injection device;
• wherein the cup has an upper portion, a lower portion, and a narrow portion between the upper and lower portion, and wherein the narrow portion includes a side draw port for fluid removal adapted to be engaged with a fluid receiving vessel for removal of a fluid from the narrow portion of the cup assembly, and
• a drive piston assembly wherein the drive piston assembly includes a drive piston slideably engaging at least part of the lower portion of the cup;
• further including a bottom plate with an aperture and a rim, the rim for fluid sealing the bottom plate to the open bottom of the cup and wherein the drive piston assembly includes a pair of cooperating, coupling threaded members, one engaging the drive piston, the other engaging the aperture in the bottom plate and a base such that rotation of the base drives the drive piston up and down in the cup;
• wherein the drive piston assembly and the bottom plate include anti-rotation members to ensure the drive piston does not rotate,
• wherein the narrow portion has a top wall angled between about 20 and about 60 degrees;
• wherein the walls of the narrow portion include a scale on walls thereof;
• wherein the side draw port includes walls at an exterior end thereof for engaging a concentrated fluid collection device;
• wherein the drive piston includes a body having walls shaped to conform to the shape of the lower portion of the cup and an upper surface having walls shaped to conform to walls of a part of the narrow portion;
• and
• wherein the walls of the upper surface of the drive piston lay adjacent the side draw port when the drive piston is in a raised position.