Step-up Chicco Teat Medium Flow is made up of two anti-colic vents. These vents keep your infant from inhaling air when feeding, protecting him or her from hazards. Step-up Chicco Teat Medium Flow includes natural sucking for the baby, as well as natural sucking for the mother.

Always full of milk, which reduces air swallowing
Encourages babies to have a proper neck posture.
Flexors at the base mimic the mother's breast and improve the teat's suppleness and flexibility.