a reservoir body having an input fluid connector to receive bodily fluid including fat cells from a liposuction device so that the bodily fluid is deliverable into a reservoir body, the reservoir body including volumetric indicia to identify a volume of the bodily fluid received in the reservoir body;

a vacuum port in communication with the reservoir body at a position to remove a separated aqueous layer of the bodily fluid while a harvested fat layer including the fat cells remains in the reservoir body;

a wiper rotatably mounted within the reservoir body so as to rotate about an axis of the reservoir body in response to movement of an actuator external to the reservoir body;

an extraction syringe matable with a conduit connector of the reservoir body to withdraw at least a portion of the fat cells from the reservoir body;

an adjustable sizing screen having a plurality of arcuate screen portions that are movable relative to the reservoir body so that said portion of the fat cells advance through a selected one of the arcuate screen portions before reaching the extraction syringe, wherein a first arcuate screen portion of the plurality of arcuate screen portions of the adjustable sizing screen has a first screen opening size, and a second arcuate screen portion of the plurality of arcuate screen portions of the adjustable sizing screen has a second screen opening size that is smaller than the first screen opening size; and

a size selector knob that is rotatable relative to the reservoir body so that the selected one of the arcuate screen portions is positioned to contact said portion of the fat cells.