... I thought that I was finally going to have a sippy cup for my daughter that wouldn't leak. I was wrong. The vent hole in the Avent sippy nipple drips, even with the valve securely in place, AND when all parts are dry when putting together. I don't know why more people don't have this problem. I even tried using another Avent top (since it comes with 2) but it still leaked. Very disappointing.
On the flip-side, my daughter loved it! Although not being insulated is a bit of a drawback for holding. ...
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