These bottles leak like crazy. I have googled it and numerous other parents have had the same issues. I have tried all of the suggestions, such as: don't screw the lid on too tight, make sure the bottle isn't too warm when you put the bottle together, don't screw the cap on to loosely, don't heat the bottle with the cap on, get new replacement parts, etc. Nothing works! I am left with leaky bottles that get all over my sons clothes, my clothes, and anything I set the bottle down on. I even tried to buy the wide neck bottles hoping those would not leak, but no luck, just more money wasted. I am extremely disappointed as I have always heard great things about these bottles. I really like the vent system but because of the leaking issue, I would not recommend these bottles to anyone.
* This product review was collected by the manufacturer.