Age and Flow Rate: The "6M+" indicates that this nipple is designed for babies aged 6 months and up. At this stage, babies are typically stronger and more efficient feeders, so the nipples are designed with a faster flow rate. Some versions of the 6M+ nipple are specifically for "thick feeds," which can include thicker liquids like cereals mixed with milk.

Natural Latch-On: The nipple has a wide, breast-shaped design that mimics the feel of a mother's breast. This encourages a natural latch-on for the baby and makes it easier to switch between the breast and the bottle.

Soft and Flexible Material: It is made of soft silicone, which is gentle on a baby's gums and is designed to flex and stretch in a way that mimics the natural feeding motion. The innovative spiral design and comfort petals inside the nipple also help to prevent it from collapsing during feeding.

Anti-Colic Valve: Most Philips Avent Natural nipples include a unique anti-colic valve. This valve is designed to vent air away from the baby's tummy, which helps to reduce air ingestion and can minimize discomfort, gas, and fussiness.

No-Drip Design: Newer versions, like the "Natural Response" nipple, have a special opening that only releases milk when the baby is actively drinking. When the baby pauses to swallow or breathe, the flow of milk also stops. This helps to prevent spills and wasted milk.

BPA-Free: The nipples are made from BPA-free materials, ensuring they are safe for your baby.