Okay I am so in love with these Playtex drop in bottles. The nipple flow is perfect for Noah. I tried nuk, nuby, tomme tippe, munchkins latch, and dr browns but my baby choked on all but dr brown preemie. Where Dr browns preemie was too slow and Dr browns 1 choked him, the Playtex match slow flow perfectly in between. Plus all you need to buy is liners and nipples and you can use a single bottle body because the milk never touches it. 😍 plus he didn't spit up like he does basically every time he eats from Dr browns! I highly recommend for my new mommy friends! You can get them online for great prices I just ordered 3 bottles and 100 liners for 14 bucks off amazon!! LOVE (: