Additive mixing for blood sample collection

A blood collection assembly comprising:

• a finger holder comprising a finger receiving portion and an actuation portion;
• and
• a sample collection container configured to be removably mounted to the finger holder, the sample collection container comprising:
• a housing comprising a first end removably connectable to the finger holder, a second end, a flow channel having an inlet and an outlet extending at least partially between the first end and the second end of the housing, and at least one flow directing protrusion adjacent the inlet for directing blood from the blood collection device into the flow channel;
• a container body removably connected to the second end of the housing comprising an open top, a lower portion comprising a closed bottom, and an interior wall extending between the top and the bottom, which define a collection cavity, wherein, when the housing is connected to the container body, the outlet of the flow channel is in fluid communication with the collection cavity;
• and
• at least one additive dispersing object configured to be positioned to be contacted by blood flowing from the blood collection assembly through the flow channel or into the collection cavity, the at least one additive dispersing object comprising an additive composition configured to be mixed with the blood passing along the flow channel and into the collection cavity,
• wherein the at least one additive dispersing object comprises:
• a disk sized to fit within the collection cavity of the container body to stabilize the at least one additive dispersing object within the container cavity in an upright orientation;
• and
• at least one post extending from either an upper surface or a lower surface of the disk.