When it comes to bottles, I’ve tried them all! With my first baby I chose a bottle system that was most conducive to pumping while I was at work. I had no issues with her taking the bottle I offered her. My second baby was gave me more of a challenge. She didn’t like the same bottles her sister took, or the bottles that came with my pump, or any other bottle I tried for that matter. At that same time, Avent had introduced their natural bottle which promised to be as close to the breast as possible, and since it had a unique nipple shape I decided to give it a try. What sold me on the Avent Natural bottles was that they came in glass, and since we were phasing out plastics in my home this worked best for our lifestyle.