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Temperature teller is made of bolometer material. It`s hollow inside. When the food is too hot, it changes it's own shape and color and make the food fall out of the spoon to stop baby eating it. Temperature teller is like a thermometer. When the temperature of the food is at a standard level that baby can stand, it returns to its normal shape and color.
Temperature teller is designed for babies who are in their growing age are not able to tell the suitable temperature of the food. Eating food which are too hot will hurt baby`s body and cause scald.
Mou Dan, Zhen Zhiliang, Yang Yuxiao, Li Minghui