HANDS DOWN THEE BEST BOTTLE! Okay so we only tried two kinds BUT the first bottle (Medela that came with my pump) was a nightmare. Our son drank the milk down in minutes (literally like 4 oz in 4 minutes) and at 2 weeks old it was causing him to be extremely fussy and upset. My ped even put me on the no-dairy/soy diet and put him on special formula. After no real change, I decided to try one of these bottles (got it from a friend who works at a hospital and these are what the neonatologist use for NICU babies). IT WAS A LIFE-CHANGING moment. He drank the milk in 20 minutes instead of 4 and has never been happier. Ended up buying six and am hesitant to try anything else. I believe we have the plastic BPA free bottles