I was really looking forward to using these bottles. I had the pump that they easily attached to and I liked how the nipple had the two layers to prevent a fast flow and act more like a breast. Unfortunately it did not work as I'd hoped. It leaked a lot and milk got trapped between the layers and was wasted. They do fit perfectly with my breast flow pump so I just use them for that purpose and use another brand for feeding.
These reviews are the subjective opinions of ChickAdvisor members and not of ChickAdvisor Inc.