Medela - Breastshield Fitting.
my aerola is large so when i use madela PIS, i pull only a small part of the nipple. so i went to buy a larger funnel. you can buy at MUMS AND BABES, united square, www.mumsandbabes.com or Metro. Go to mums and babes, the salesgirls can help you to see if the funnel fits you or not. (if you dont mind leting them see your nipple)
i personally bought there but later my lactation consultant recommended another type of funnel. i really love it but they only sell online, Mumsfairy :: Bringing you breastpump accessories for Avent, Ameda & Medela from Pumpin' Pal, BPA-free baby products from Nurture Pure and silicone protective skins for glass bottles from Silikids. - product info
i find it is better than the coventional one
you choose yourself , just to share my experiences.....