The ornamental design for a nipple and bottlecapretainer, as shown and described.
FIG. 1 is a top perspective view of a nipple and bottle cap retainer
showing my new design with two bottle caps and two bottle nipples being
shown in broken lines for illustrative purpose only;
FIG. 2 is a top plan view, the bottom being the same in appearance;
FIG. 3 is a right side elevational view, the opposite side being the same
in appearance; and
FIG. 4 is a front elevational view, the rear being the same in appearance.