Pop-up Sink Stopper

FIG. 1 is a bottom, front, right side perspective view of a pop-up sink stopper in a closed state showing the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof, the right side elevational view being the same therefore omitted;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top, front, right side perspective view thereof, showing a top central cap in a pop-up state from a central position of a flange, wherein a sealing washer is attached to a bottom of the flange; and,

FIG. 8 is a bottom, front, right side perspective view in the closed state thereof, showing the sealing washer attached to the bottom of the flange.

The dashed broken lines in the drawing depict portions of the pop-up sink stopper that form no part of the claimed design. The broken lines showing the sealing washer in FIGS. 7 & 8 are for the purpose of depicting environmental subject matter which forms no part of the claimed design.