Collection of biological fluids. At least some of the example embodimentsare polymeric sleeves including: an elongate body that defines a first end, asecond end opposite the first end, and a longitudinal central axis； a mainpassageway through the elongate body parallel to the central axis, the mainpassageway extends from the first end to the second end, and the mainpassageway defines a first aperture on the first end and a second aperture onthesecond end； a first member suspended over the first aperture on the first end,thefirst member defines a first initial passageway parallel to the mainpassageway,and the first member and first end define an interior volume； and a first ventopening defined in part by the first member, the first vent opening distinctfrom thepassageways, and the first vent opening fluidly couples the interior volume toatmosphere pressure.
