I bought a set of Dr. Brown's BPA free bottles, along with several other brands and types, before our son was born. When he was born, the Dr. Brown's were the first I tried. We loved them so much that I've never used the other bottles! My son doesn't get extra air with these bottles and seems to love the shape of the nipple, etc. Although I am not rich by any means, the Dr. Brown's are well worth the money to me. My son never had colic and that is worth spending a little more money on bottles!