Bottle plug

FIG. 1 is a front-left-top perspective view of a bottle plug, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left elevational view thereof;

FIG. 5 is a right elevational view thereof;

FIG. 6 is top plan view thereof; and

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view thereof, the element shown in broken lines is for illustrative purpose only and forms no part of the claimed design.