1 The Children's Hospital, 240 Bethesda Ave, Cincinnati, OH 45229
In Reply.
Perhaps, we should not have called the nipple "gravity flow," because, as described in the manuscript, the formula is expressed through the nipple by means of a compressible plastic feeding bottle. The bottle is compressed manually in order to deliver the formula.
What we introduced was a standard nipple that does not require puncturing with extra holes, cutting with a razor blade, or altering in some other manner.