Silicone orthodontic wide neck teats with large hole for feeding thick liquid feed. Actiflex system prevents the teat from closing up, thus ensuring even flow. Anticolic vent prevents air from being swallowed, thus reducing the risk of infant colic.̴Ì_ Wide lip rest for a natural drinking feeling. Extra thick perfect -fit flange for optimum non-drip fit on the bottle neck. Made in Germany.