... Origin:China(Mainland) Material:Bottle: PP,heat-resistant to 200,sterilizable.Nipple: cross cut silicone nipple,heat-resistant to 200 ,sterilizable..Twist Cap ... : polypropylene,heat-resistant to 120,sterilizable.Bottle Cap: polypropylene,heat-resistant to 120,sterilizable.Bottle sleeve: without handle ,match with twist ...