I've been told that some bottles are better for breastfed babies than others because they mimic the breast better. Does this apply after breastfeeding is "well established"? A LC told us when baby was first born and we had to do some supplementing to choose a nipple with a wide base. We've been using the Dr. Brown's widemouth bottles ever since, but I'd love to switch to a bottle that is compatible with my PISA to reduce the number of bottles we are washing. Does anyone have a bottle that works with the PISA that they really like? Thanks