1113211C Tinted. Without BPA. Best for baby. Reduces gas. With micro air vents. 30 years committed to breast feeding. Soft and flexible, CustomFlow nipples sense baby's pressure and respond with the right amount of liquid. Micro Air Vents help prevent or reduce nipple collapse and minimize air ingestion. CustomFlow nipples come in Slow, Medium and Fast flow to meet your baby's changing needs. Works with Comfi, Classic, and Comfort Select bottles. CustomFlow Nipple adjusts to baby's pressure. Micro Air Vents keep air out of baby's tummy. March of Dimes (Helps give every baby a healthy start). Made in Mexico.