My daughter is 6 months old and I breastfed up to 4 months. I started by using the step-up bottles Chicco 1 and 2. The arguments of the brand are very convincing but the product itself is very disappointing. At 6 months I could never exceed the speed 2 with my daughter. And yet, it often swallowed wrong and milk flowed from the corners of the mouth. We finally decided to change the bottle. For those two months we thought she was going to do it, she had simply not yet "found the trick" after breastfeeding. In a childcare store near us the seller urged us bib Mam, which he said were often very well accepted by babies who breast-bottle transition is somewhat complicated. We are left with a 330ml Mam bib that automatically includes a teat for thick liquid X and teats 3 for fear that the flow rate is much too fast for her. We tested that evening. And there was the day and night! No more searching unreadable digit rate on the teat before putting it in the mouth, more milk leaking when shaken bib, more milk flowing from the mouth => the bavoire became completely superfluous! The reading on the bib is easy and maintenance too. A real pleasure to give him the bottle now, and she, as btw, is much more relaxed! Why have not we done before? .... That's why we bought two more via Amazon, a little cheaper than baby store. We highly recommend it to all levels!