These amazing nursers use a special flow-control technology that mimics the way your breast functions, so the transition from breast to bottle is easier for your baby. The nipples have a membrane with multiple tiny holes at the tip. When your baby's not feeding, the holes remain completely sealed, eliminating spills and messes. As your baby begins to suck, the membrane flexes in and out so the holes open up. The stronger the suckling, the more the membrane flexes to increase the flow of liquid. This allows your baby to control the flow naturally, resulting in less air, which can cause painful gas. Second Nature Newborn Nurser Set.

This innovative nurser with a new and improved nipple uses a special flow-control technology that mimics the way your breast functions, easing your baby's transition from breast to bottle. The nipple has a membrane with multiple tiny holes at the tip. When your baby's not feeding, the holes remain completely sealed, eliminating spills and messes. As your baby begins to suck, the membrane flexes and the holes open. The stronger the suckling, the more the membrane flexes to increase the flow of liquid. This allows your baby to control the flow naturally, resulting in less swallowed air, gas, and colic. Second Nature Nurser.

Use these sealing discs to convert your Second Nature Nurser into a breast milk or formula storage container. Simply remove the nipple from the Nurser cap ring, insert the sealing disc, and tighten. Refrigerate or freeze immediately. Second Nature Sealing Discs (4-Pack).