FIG. 1 is a perspective view of a nipple for a nursing bottle showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a bottom plan view;

FIG. 6 is a cross sectional view taken on line A--A of FIG. 3; and,

FIG. 7 is a cross-sectional view taken on line B--B of FIG. 2.