Previously known as the Lansinoh mOmma Bottles, these Lansinoh Bottles for Breastfeeding Babies work as an interchangeable part of our Pump - Store - Feed system across our products. Express directly into the bottle with any Lansinoh breast pump then use the baby bottles to store and feed the breast milk. Our NaturalWave nipples are clinically proven to reduce baby's nipple confusion. Each bottle comes with a super soft and flexible silicone nipple that enables baby to use natural sucking motions while feeding. Each of our five ounce Lansinoh bottles include our slow flow (2S) NaturalWave nipples and work great for paced feeding.