Perfect for a busy mom on-the-go, the Playtex Nurser with Drop-Ins Liners provides benefits that mom and baby will enjoy. Disposable Drop-Ins Liners make this bottle easy to use and easy to clean, and provide a comfortable feed for baby. As baby feeds, you can see the soft liner gently collapsing to prevent air from mixing with milk and getting into baby's tummy. This means less gas and less discomfort for baby.FeaturesUniquely designed to reduce colic.Convenient, disposable liner collapses like the breast to help prevent air from mixing with the milk.Optional angled position promotes semi-upright feeding which is recommended by pediatricians to help prevent ear infections.Twist 'n Click seal provides a leak proof seal.BPA FreeCapacity - 4 oz.