Again, Philips Advent is up to its reputation. Light and handy, without bisphenol A, so respectful of the health of all children. It is a bottle that is well in hand and fatigue, when the smurf decides to fall asleep on his meal! ;-)) Practical: the opening is wide, so you can easily clean and also fill without putting off. Double Graduation (ml / oz). What particularly pleased me was the wide teat close to the shape of the womb, medium flow, rather suitable for babies from 3 months and older. In addition it is really flexible and easy to rinse.
All this for a price that seems to me relatively reasonable.
I do not know if it is the valve system (I would say yes ...), but I found less regurgitation. I am really pleased with and I therefore commend these bottles without hesitation!