We claim the ornamental design for a soap dispenser, as shown and described.
FIG. 1 is a top, front, left perspective view of the embodiment of the claimed design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines formed by equal length dashes show portions of the design that form no part of the claim. The broken lines formed of dash-dot lengths show boundaries of the claim.