Nipple Enfamil Standard Flow Soft Tip Infants Mead Johnson 428843- Case/240. Standard Flow Soft Tip Enfamil nipples are made of surgical-grade plastic (TPE or thermoplastic elastomer). Replaces Mead Johnson 428816. For use with nursetter glass bottles. Enfamil nipples are ready-to-use, come individually wrapped. Vented to allow airflow while the baby is sucking. Case of 240 Nipples.