We claim, the ornamental design for a sink, as shown and described.
FIG. 1 is the front/right-side/top perspective view of a sink showing our new design;
FIG. 2 is the front elevation view thereof;
FIG. 3 is the rear elevation view thereof;
FIG. 4 is the left-side elevation view thereof;
FIG. 5 is the right-side elevation view thereof;
FIG. 6 is the top-side plan view thereof;
FIG. 7 is the bottom-side plan view thereof; and,
FIG. 8 illustrates the sink in an extended position.
The surface treatment of the sink shown in the figures forms no part of the claimed design, a sink according to the claimed design may have any surface treatment.
It is contemplated that other embodiments of their design may include any part, portion, element or combination of elements of the claimed design.
The broken lines illustrating portions of the sink are for environmental purposes only and form no part of the claimed design.