This manual breast pump is used for collecting, storing and feeding breast milk, and the Harmony blends quiet, effective pumping with ease, genuine comfort and optimum convenience. Heat the breast pump with hot water for 3-5 min, and wash the pump after use. Made of food-grade PP & Silica gel. Temperature resistance: 110??. Heating it with hot water 3-5 min before use. Wash the pump after use—150 ML.