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Title: Good bottles, but can't use this size for very long.
Review: I have rarely had a problem with my Avent bottles leaking. Often, I will do a wet seal by running my wet finger around the rim of the bottle and the rim of the nipple. Also, make sure you pull the nipple through the ring all the way and do NOT over tighten. My baby gets one bottle a day of breastmilk and breastfeeds the rest of the time. He has been able to switch back and forth without any problems. My only complaint is the 4 oz. size doesn't seem to practical. He's only 5 months old and drinks anywhere from 4-6 oz. at a feeding and has been doing this for several months. My advice would be to only get a couple of the small size and get more of the 9 oz. bottles.
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