Comotomo Nipple-Packs are replacements specifically designed for Comotomo Baby Bottles. Each pack comes with 2 silicone nipples designed to most closely mimic natural breastfeeding. Our naturally shaped, soft, silicone nipples are ideal for babies who have trouble transitioning from nursing to bottle-feeding. Each replacement nipples also have two truly innovative vents that are built in to prevent colic, while totally eliminating leaking issues. Naturally shaped, soft, silicone nipples - ideal for breastfed babies - Designed to eliminate nipple confusion issues - Dual anti-colic vents prevent unwanted air intake and reduce colic - ComotomoTM replacement Nipples grow with your baby Easy to Clean: - Safe in microwave, boiling water, dishwashers and sterilizers Safe Feeding: - Made of 100% safe, hygienic, medical-grade silicone“Truly” Slow Flow (1 Hole) 0-3 monthsMedium Flow (2 Hole) 3-6 monthsFast Flow (3 Hole) 6+ monthsVariable Flow (Y-Cut) 6+ months (thicker fluids) | Comotomo Teat Nipples, Slow Flow in Clear