I loved these first of all, because of the price. I started my daughter with MAM bottles and unfortunately, she now won't use any other bottles. When we went from 20 MAM's down to 2, I thought I could go out and get some cheep but effective bottles....but nope. Thankfully they weren't expensive at all so I just ended up throwing them out but when I have my next child, these will be the ones I try and use most, along with the MAM's because they do work well.