Love these bottles!!! I am a second time mom, I had very few problems with my first son as far as feeding and breast feeding. With my newborn daughter it was a totally different story, she had a terribly shallow latch, and was a ravenous eater. Needless to say I was miserable. We tried two other bottles and I exclusively pumped for about 2.5 weeks before finding this bottle. The gift set is perfect, it has EVERYTHING!! I couldn't ask for more! It has the pump adaptor the shaker cap and bottle cleaner, even a binkie. It took a day and a half for my daughter to fully grasp the concept of the large (but amazingly soft) nipple. At first she hated it, because she didn't like to open wide and create a large latch. But by the second day she opened wide and had a nice large (CORRECT) latch. Then she realized how easy it was to drink with a good latch and she sucked the bottle down fast! The nipple is absolutely perfect, I have yet to have it collapse, but if you don't clean the bottom valve it can collapse. The pumping action is so spot on you'd be surprised all bottle brands don't have it. This bottle saved my breastfeeding relationship with my baby girl and for that I will forever be grateful!