Sink accessory

FIG. 1 is a top, front, left perspective view of an embodiment of the claimed design;

FIG. 2 is a bottom, front, right perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines in the drawings form no part of the claimed design. Broken lines formed by equal length dashes show unclaimed subject matter. Broken lines formed of unequal length dashes (i.e., dash-dot) define bounds of the claimed design. The sink accessory is shown with a symbolic break it its length and width. The appearance of any portion of the article between the break lines forms no part of the claimed design.