The water temperature must not exceed 85°c, and the capacity must be two thirds. after filling the water, squeeze the excess air out of the bag and adjust the cover. to ensure safety ,please place the hot water bag below the mouth and check for leaks. children must be cared for by their parents to avoid burns. it is not suitable to pinch hot water bags with strong pressure or sharp instruments do not heat in the microwave, avoid direct sunlight and contact with grease