For the more mature baby comes this 9oz Options bottle by Dr. Brown's. As with the other bottles in the Options collection, this bottle comes with an internal vent system that's been shown to reduce colic in your baby and help with feeding and digestion. It's also been shown that more nutrients are preserved with the use of Options bottles. The nipple venting creates a paced flow, and provides a feeding experience similar to most nipple-vented bottles. The bottle can also be used without the venting system - an option for older babies. Dishwasher safe (top rack only). BPA-free.