I put 5 stars because for this kind of product, it is perfect because the silicone nipple is designed for the baby to have less stomach ache although so far I have not noticed any difference. The only regret that I can afford to issue it is the very idea of designing a sophisticated plastic bottle may be. I had the experience to put hot water in the bottle and drink myself this water without any processing or addition of other stuff and I immediately had the taste of plastic in the mouth, while this was not the case for water placed in a glass glass. So my question is why not return to glass bottles shatterproof course just to see if that does not solve the best baby belly pain problems ????
