Dr Browns 60ml Premmie Standard Neck Bottle is specially designed for use when feeding very young or premature baby’s. The bottle capacity measures 60 ml (roughly 2.1 oz) ideal for smaller feeds, the teat included with the bottle is made from soft silicon and has a slower flow than normal for premature children. The built in venting system of the Dr Browns 60ml bottle allows air to enter through the neck of the teat reducing vacuums and does not mix with the food to ensure no air bubbles are created, the air flow system ensures the feed is easy to draw through and is clinically proven to reduce infant colic and wind.