To Natalie Shenk: Several years ago, the P------ orthodontic nipple packages suddenly started being labeled "for babies 6 months to 1 year", when no such designation had previously been there. I got a flurry of calls from mothers wanting to know if their daycare should stop using them with their ie. 4 month old baby, who was previously having no problem with them. I can still see very little difference in the size of the part that goes in the baby's mouth between those nipples and the ones we use with newborns in the hospital. Just thought you'd like to know this bit of history, in case it helps. Katie