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This is a design for a pacifier. The highlight of this design is the new environmentally friendly material which can expand with heat, splicing in the middle of the pacifier. This new material expands with heat and contracts with cold.It will expand to plug up the pacifier when the water temperature is above 38℃, so it can protect the baby’s mouth and avoid scalding. This design can prevent the problems caused by careless mothers who can now feel secure when they give the baby a bottle.