The ornamental design for a winestopper, as shown and described.
The wine stopper is inserted into a wine or champagne bottle after it has been opened. The wine stopper, once properly sealed into place on top of the bottle, can then be opened at the top and liquid will be allowed to pour through the body of the stopper and into a glass.
FIG. 1 is a front elevational view of a wine stopper showing my new design with the lid closed;
FIG. 2 is a side elevational view thereof with the lid open,
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof; and,
FIG. 5 is a back elevational view thereof with the lid closed.
The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.