Reliable: Comply with EU and USA FDA regulations for materials that contact food. Tested by independent labs for quality and safety. All items are packaged in retail pack and sealed by the manufacturer KISSBOBO. Can be cleaned with boiling water or water steam. BPA-free: Food grade material,Made of durable and food grade material,it is easy to wash and ideal for nursing mother. mother. Compatible: Replaceable duckbill valves for kissbobo wearable breast pump.Like KISSBOBO S12/ABP-1508. Comfortable and Efficient Pumping: The duckbill valves is important for efficient pumping. Deformed parts can cause sucking failure or fluid leakage. We recommend replacing the duckbill valves every 1 to 2 months to ensure optimal performance.