Kris, A couple of years ago I sent for information on the White River Pump and the nipple you mention was in there. It was supposed to help prevent nipple confusion. I never went through with getting started with the company, so, I never got to see if this was true. I am glad to hear that it worked, at least for your client. Pat mentions that the pump is really lousy. I never got to see it in action, except on the video, so, I don't know. "Breastfeeding and Human Lactation" by Riordan and Auerbach says that it is the pump that stimulates the highest prolactin levels and the highest milk volume for mothers. But mother satisfaction rated it as one of the most uncomfortable to use with some reporting that the flange will occasionally pinch the nipple as it collapses. I don't know, maybe that is why they are not as big as the other rental pumps around the country. I am going to do a search on Lactnet to see if this has been discussed before, but if anyone has any client or personal feedback, I would be glad to hear it. My curiosity is at work, again. Thanks, cheryl *********************************************** The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html