Our bottle's nipple hole is not large enough for water to pass through. We have all tried multiple ways of getting water out and it is extremely difficult. Furthermore, any kind of sucking or squeezing of the bottle only creates huge indentations in the bottle as weird air pressure issues inside the bottle begin to cause the lid to leak out of the side of the bottle. Needless to say, this has not been a good purchase and we've already put it in the cupboard likely never to be used again. A real bummer.
I was looking for a safe alternative to glass bottles now that my son is getting older. They are easy to clean and safe for my son to hold on his own. I definitely plan on purchasing a few more.