Clever-Milk-Bottle / milk nottle

This Clever-Milk-Bottle can change the color according to the temperature of the milk or other hot drink in it. The bottle bove 85°C is red, then from orange to yellow shows the temperature wents down.From 40°C the bottle become to a light green.The
most suitable temperature for bany to drink is 36-38°C,which is
shown in peacful green. While mperature dropped down, the
bottle will show blue, remind parents that milk has been cold.