We are using playtex drop in bottles. She has been using the slow flow nipple, it takes her about 20 minutes to eat, but she gets really fidgety and cranky like it's not coming out fast enough but it doesn't leak out of her mouth very little mess. So I tried the medium flow she drank it in 5 minutes, wasn't fidgety, but at least a quarter of it went on her, very messy. Just thought I'd get opinions on the nipple flow and if I should stay with the slow or not.