An adapter for use in a system for collecting colostrum and/or milk from a breast may include: a body having a predominantly cylindrical shape; a first open end of the body for connecting to a funnel device; a second open end of the body for connecting to a source of suction; a side port between the first and second ends for connecting to a fluid collection device; a catchment area at or near the side port; and a blocking member between the side port and the second end, for preventing colostrum from passing beyond the side port and through the second end. The blocking member may include at least one aperture for allowing suction force to be transmitted from the second end to the first end.