This BPA-free bottle features an anti-colic valve that flexes to allow air into the bottle, reducing colic. It also has a built-in valve that keeps air out of baby's tummy and lets baby control milk flow, which can help reduce the risk of overeating and spit-up. The soft, naturally shaped nipple makes it easier to combine breast and bottle feeding. Made from PES, a BPA-free material, its ultra-hygienic design is easy to clean and assemble. Also features a natural honey-colored tint. Measures four ounces. Includes two bottles.