I have advent and I have these bottles I came home from the hospital with.
She seems to be having trouble with both. The hospital ones come to quick forcing her to gulp and dribble a lot. The advent ones she seems to not be drinking a lot and gives up half way through.
I am not breast feeding so it does not need to be similar to that. She does seen to have issues with colic so do etching good for that as well.
Thanks in advance for any assistance!!!