The Classic+ Philips Avent variable flow nipple has a unique anti-colic valve that flexes to keep air in the bottle and out of your baby's tummy, a feature that reduces fussing* and colic**. The unique valve flexes to your baby's feeding rhythm so milk will flow at the pace chosen by your baby for more comfort. These soft, rounded Classic+ nipples are made of dishwasher-safe silicone, which is flavorless and odorless.

Variable-Flow Nipples for Thicker Liquids
The Classic+ variable flow nipple has a slot-shaped opening that can change the flow of milk. Simply turn the bottle to line up the I, II, or III marking with your baby's nose to choose between slow, medium, and fast flow.