The ornamental design for a bagrefillunit for waste-disposal device, as shown and described.
FIG. 1 is a perspective view of a bag refill unit in accordance with the present design;
FIG. 2 is a top plan view of the bag refill unit of FIG. 1;
FIG. 3 is a bottom plan view of the bag refill unit of FIG. 1; and,
FIG. 4 is a side elevation view of the bag refill of FIG. 1, with side elevation, front and rear views being mirror images of one another.
The broken lines showing structural supports and peripheral components in each figure are for illustrative purposes only and form no part of the claimed design.