... 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 ... without handle ,match with twist cap,polypropylene,heat-resistant to 120. Features: (1),safe ... ,odorless,nontoxic,high and low temperature resistant(-50~200,sterilizable,ametabolic,keep fresh ...