My health visitor recommended using breast shields to help 'pull out' my nipples, which are quite flat, to help my baby latch on a little easier. These shells did help to do this and my wee boy and I eventually mastered breastfeeding, which is a wonderful thing. I did have an abundant milk supply too so I did use them to collect excess milk, but found this very messy. It's difficult to pour the milk out once collected without making a mess. I found using merino washable breast pads much better to soak up milk. However, these shells helped me out with the problem I had so recommend them for this purpose.