M.B.
Have you spoken with a lactation consultant? I breast-fed primarily and had to supplement both my children(jaundiced). There are different bottles that help with "nipple confusion". If you were planning on bottle feeding solely or a bit of both the lactation consultant can help. I sent mine flowers!! Personally I love the Dr. Browns and mine never leaked. The avent bottles will leak if the top is not placed on with precision and when you are sleep deprived and the baby is crying, that never happens. Best of luck to you!