Avent 4 0z bottle Baby Bottle Review

I chose these bottles originally bacause I was looking for a bottle system that had an anti-colic vent, but not too many pieces to clean.  I read about the leaks, but thought that those people were just tightening the collar too tight, or not tight enough, and I could get them to work.  Well, I was wrong.  My husband and I nearly had fits trying to deal with these bottles.  You just do not have time trying to find the perfect setting for the collar when your infant is screaming for food,  I even called Avent about the problem, they were very nice, and sent free replacement bottles, as well as a dropin system.  No matter, they still leaked.  I did some internet research, and found that Gerber Gentle Flow bottles use the Avent nipples, and have the same anti-colic system.  They are BPA free also, but it does not state that on the packaging.  If you contact them you can verify this.  But they are made from a more malleable type of plastic, and do not leak.  We have had great success with the Gerber bottles, and we just buy the Avent nipples when we need to go up to the next level.  The only problem is they are hard to find- we have only been able to buy them at Walgreens, or on Amazon.