The Emerson Healthcare Lansinoh Baby Bottle is designed to support natural feeding behaviors and minimize common infant feeding issues. This 8 oz., 4-count set features a clinically proven nipple that reduces nipple confusion, allowing your baby to use the same feeding actions learned at the breast. The innovative Air Ventilation System (AVS) helps reduce the intake of gas, which can be a cause of colic and spit-up. Each bottle includes a NaturalWave nipple, made from 100% silicone, offering softness, flexibility, and optimal compression for a comfortable feeding experience.