A.Z.
I am w/Kristi on this one...my twins(who are now 5) were non-stop spitting up and we tried every bottle under the sun and doctor visits. Finally, we found the Dr. Brown's bottles and they were the best thing ever. I have also only feed my girls carnation good start b/c it is really gentle for them-and it doesnt smell as bad as other formulas when they spit up. Good Luck!