I used these bottles with all of my kids because I wanted to avoid BPA and any other bad chemicals that might leach from plastic. They clean really well in the dishwasher, which every mom of a baby needs :) The downside is that they are breakable. I found them to be pretty sturdy though; they didn't break even when dropped on most surfaces, but concrete or hard tile will definitely make them shatter! As long as you leave some head-space they will freeze nicely if you are wanting to store breastmilk. Overall, they were cost effective and I was happy with them!