My daughter is bottle fed. I originally bought the kiinde set and I was using it to pump and feed. But I found out at 2 weeks old she's lactose sensitive. So I decided to stop pumping. I didn't want to deal with the kiinde because its hard to measure water. But every bottle I bought she refused because she would gag and chock. I couldnt figure out why. But I found it. Its the nipple flow. She like the extra slow flow. Premi nipples. Now no problems. What a picky baby.