I started my newborn on an anti colic bottle from a different brand, but it still caused acid reflex. Seeing my 1 one month old in pain at night struggling to sleep was heartbreaking! Then I had remembered I received a free Dr Browns option bottle from a purchase at babies r us, so why not give it a try. Seems like my baby liked classic nipples better than wide neck. After using the options bottle just after a few days, definitely noticed baby being a lot calmer and gas relief became easier. He still had some gas using the bottle but it was much easier and quicker to burp. So I went to buy a full set of bottles. Cleaning the bottle and parts wasn't that bad as some of my friends had warned me about, it was quick and easy. And I liked the fact that you can still use the bottle without the venting system as we had forgot to put it in a few times. Some of the bottles leak while shaking and feeding, tried to tighten the neck and vent cap but doesn't work. I dealt with it as some of the bottles were fine and most importantly it solved the gas problem. My baby is 10 months old now and still loving the options bottle. I'd recommend to any baby with gas and colic!