The leaf-shaped AirFree vent leads air bubbles away from the teat and keeps it full of milk even when used horizontally. This helps reduce the amount of air swallowed by the baby, allowing it to feed in an upright, seated position. This can help resolve common feeding problems such as colic, gas and reflux. The iconic and highly visible venting part is designed to express the innovation. The AirFree vent visibly keeps the teat full of milk, not air, which can provide reassurance for parents.