Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Lovin' the Avent Bottles

These are great bottles. They fit right onto the Avent Isis pump which is convenient. I did have trouble with it leaking once in a while, which is aggravating, especially when it's pumped milk you're losing, but I read somewhere that leaks happen when the cap is screwed on too tight. I've had fewer leaks since then. You'd think with such a pricey product, Avent would fix that, especially since everyone seems to complain about it.However, overall, this is a good bottle and I don't plan to switch anytime soon.