... 1.unbreakable and soft touch 2.good temperature resistanct from -50 degree to 200 degree. 3.keep warm Silicon drinking bottle ... ,sterilizable.Ribbon: soft,no-hurt, no pressure, nylon, durable, easy to clean.Bottle Cap: polypropylene,heat-resistant to 120,sterilizable ... sleeve: polypropylene,heat-resistant to 120.Botte: unbreakable and easy to hold,washable, convenient to fill, medical-grade silicone ...