About 27 years ago when my second one was born, I was told this tip. It is true, and the doctors do not want the moms to feed anything besides formula or breast milk for a certain length of time, but sometimes the milk is not enough! So I have mentioned this now and again to young mothers whose babies are not quite satisfied. I do not know what the nipples are like these days, but back then we had to enlarge the hole a tad, so the thickened formula would flow through. Isn't it great when they sleep like babies?! And, thanx to You, I have started crocheting again. So Thank You.