What it is: This teat has a special Y-cut which allows for extra fast flow and is suitable for semi-solids (milk with added cereal or rice powder).What it does: The elliptical-shaped teat closely mimics a mother's lactating breast while the off-center teat design promotes upright feeding-similar to a position in which babies are nursed-to reduce the risk of milk back-flow that can result in mid-ear complications and colic. The built-in anti-colic air vent reduces unwanted air intake and prevents bubbling of milk, saving nutrients from oxidation. How to use: Gently squeeze the anti-colic air vent to ensure it is open. Place the collar over the teat. Pull the teat through the collar until it is snugly fitted. Pack of six For thickened liquids BPA-free; BPS-free Silicone Hand wash Imported