Patented design featuring a built-in channel that lets you see your breast milk flowing Soft-touch silicone nipple shield made of 100% food-grade silicone, BPA free Designed for ultimate skin-to-skin contact and comforts sore nipples AWARD WINNER: 2025 NAPPA & Parents’ Picks Award Winner! All-in-one breastfeeding starter kit includes Munchkin® Flow nipple shield, convenient case that doubles as a steam sterilizer for easy travel & cleaning syringe to keep Flow’s built-in channel clean Available in two sizes: 20mm and 24mm Clinically tested HSA/FSA approved