I claim the ornamental design for a disposable bag, as shown and described.
FIG. 1 is a front view of a first embodiment of the disposable bag showing my new design, the rear view being a mirror image thereof;
FIG. 2 is a side view, the other side being a mirror image thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a front view showing its usage state thereof; and,
FIG. 6 is a front view of a second embodiment of the disposable bag; the rear view being a mirror image thereof. The side, top and bottom views of FIG. 6 being identical to the side, top and bottom views of FIG. 1.
The broken line showing of trash bin and fingers expanding the bag is for illustrative purposes only and forms no part of the claimed design.