Dr Brown's single 120ml glass baby bottle is BPA free with an anti-colic vent insert that relieves the vacuum normally found in standard baby bottles. The patented air vent found in Dr Browns glass bottles helps to relieve your babies suffering from an upset tummy, colic, excessive wind or gas, and spit-up.
I've been using the Dr Brown bottles and the Nuby bottles with vari-flow nipples. I have found that the nuby bottles with vari flow nipples give my son the least amount of gas. The nipple allows for the milk to be dispensed more like it is from the breast.