Thermal expansion nipple / Thermal expansion nipple

Thermal expansion nipple is part of the nipple of a bottle made barrier design. For babies, Something it is difficult for them to express and cognitive, so it is easy to be hurt.
In this design, the nipple part is influenced by the perceived changes in temperature, when the temperature is too high, the nipple part is swollen, the milk outlet hole by extrusion leads to closed, nipple swell at the same time, the baby can not bite the nipple, so that the baby can not drink milk in the condition of high temperature, let the baby against scald.