Our SofTouch Wide-Neck Teat is clinically tested for seamless switch between breast and bottle, making it possible for parents to combine breast and bottle feeding easily. Details Sterilization Material Allows smooth transition between feeding from breast to bottle and eliminates the issue of nipple confusion. The teat is of perfect shape and size to fit into the sucking fossa of your baby. Inner vertical lines strengthen the structure of the teat, making it collapse-resistant. Textured surface allows the baby to latch on easily and securely. 100% silicone teat, super soft and flexible that allows natural and smooth tongue movement Air Ventilation System (AVS) reduces gas intake, a potential cause of colic. Boiling, Steam, Chemical Part Material Heat Resistance Teat Silicone Rubber 120 Degree Celsius