Valve x4pcsPremium Quality:BPA free DEHP freeTested by independent labSafe for mom and babyBPA/DEHP FREE. Complies with US FDA regulation for plastics that contact foods.Dishwasher top rack safe; Steam safe for sterilization. Wash this piece with hot, soapy water. It is not advisable to insert any object into the valve opening to clean it. This may tear or stretch the part resulting in poor performance. Check the valve frequently for tears.