Patent ID: 7552831

Claim:
A nipple adapter comprising: a nipple comprising a first outer sealing flange, a second outer sealing flange, a first end, a second end opposite the first end, a base portion proximal the first end, and a teat portion proximal the second end, the base portion comprising the first and second outer sealing flanges; and a cylindrical nipple housing comprising: an inner annular wall that defines a bore extending axially through the housing; an annular flange disposed on the inner annular wall; a first thread extending from the annular flange to a first axial end of the nipple housing; and a second thread extending from the annular flange to a second axial end of the nipple housing, the first thread having a pitch that differs from that of the second thread, the nipple being reversibly disposed within the nipple housing such that the annular flange is disposed between the first and second outer sealing flanges and the first and second threads are alternatively exposed for mating with corresponding threads of a variety of water bottles, the base portion further comprising a cover flange, the cover flange covering one of the first and second axial ends of the nipple housing.