Negative Positive
Title: Leak, leak, leak.....
Review: If I had not been given a ton of Avent bottles, I would have chosen some other system. The leaking is terrible!!! You have to buy the disks separately, you should get them for free because they are absolutely essential. The only way to mix formula in the bottle or transport liquid is to use the disks in the ring, then switch to the nipple when you are ready to feed. The only reason I give it a two is because I do like that you can pump directly into the bottle with the ISIS breast pump. And, I like the sippy cups.
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