I claim the ornamental design for a waste can transport unit, as shown and described.
FIG. 1 is a perspective view of the waste can transport unit of the present invention with side waste can attached.
FIG. 2 is a perspective view of a side waste bin, which may be attached to the lower side of the transport unit as shown in FIG. 1, being shown separately for clarity of illustration only;
FIG. 3 is a perspective view of a side waste bin which may be attached to the lower side of the transport unit as shown in FIG. 1, being shown separately for clarity of illustration only; and,
FIG. 4 is a right side view of the waste can transport unit of FIG. 1.
The broken line showing of a trash can is for illustrative purposes only and forms no part of the claimed design.