Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good bottles, but....

I prefer the VentAire bottles with the wider nipple bases. These nipple bases are really narrow. If you are looking for nipples that are likely better for breastfed babies, I would go with the wider nipples. Because of the difference, obviously the tops are not interchangeable, but the bases between the wider bottles and these thinner bottles are interchangeable. These are easy to use and wash, they make my baby less gassy, and she can hold the bottle if I need her to. I still prefer the wider bottles, though, since she is generally breastfed. I have switched to VentAire bottles over the drop-ins, Tommy Tippee and Avent bottles because I like these the best.