Bottle Stopper

FIG. 1 is a perspective view of a bottle stopper, in accordance with an embodiment of the claimed design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposing side view of FIG. 4 ;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.