NUK FC+ PP 300 ml Latex Temperature Control Baby Bottle With temperature control indicator on the measuring scale. The color changes with the temperature of the bottle contents. If the food is too hot, the indicator changes from blue to white. Free from harmful substances, odorless, and BPA free. Wide neck for easy filling and cleaning. Uniquely anatomically shaped latex teat fits perfectly to baby's jaw, 0-6 months, M (medium hole = milk) and 6-18 months, L (large hole = thick food). With improved NUK ANTI-COLIC AIR SYSTEM ventilation system that helps prevent colic. Includes screw ring, closure disc and protective cap.