We claim the ornamental design for a sink accessory, as shown and described.
FIG. 1 is a perspective view of an embodiment of the claimed design;
FIG. 2 is another perspective view of the design of FIG. 1;
FIG. 3 is a top plan view of the design of FIG. 1;
FIG. 4 is a bottom plan view of the design of FIG. 1;
FIG. 5 is a front plan view of the design of FIG. 1;
FIG. 6 is a rear plan view of the design of FIG. 1;
FIG. 7 is a right plan view of the design of FIG. 1; and,
FIG. 8 is a left plan view of the design of FIG. 1.
Portions of the sink accessory are shown with symbolic breaks in length. The appearance of any portion of the article between the break lines forms no part of the claimed design.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. The dash-dot lines which define the bounds of the claimed design form no part thereof. Wavy lines illustrate regions of indeterminate length.