I started using dr.browns with my preemie in the hospital and continued when we got home as well. They helped reduce colic and reflux. They are more expensive but I would recommend them anyways because of the quality

I really liked Dr.brown plastic bottles at first but then it was just a pain to have to wash two extra parts that need special tools. I felt like no matter how many times I cleaned them they never got fully cleaned.pain in the butt!