FIG. 1 is a top plan view of a nipple, showing my new design;
FIG. 2 is a front perspective view thereof;
FIG. 3 is a right side elevational view thereof, the left side elevational view being identical;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a bottom plan view thereof; and
FIG. 6 is a front elevational view thereof.