The Dr. Brown's line of baby feeding bottles are the best product for the best price that I've found. I've got four children from 7 months to 7 years, and I've done some shopping!! The bottles themselves are very high quality manufacture. The ounce markings have survived multiple children worth of washing and there's none of the clouding to the bottle that sometimes happens. The nipples last longer than my babies have needed them and even withstood the first stages of teething. But I think the BEST feature is the vent system inside of the bottle that keeps milk from leaking and dripping when the...