The Sirena 20 oz Vacuum Insulated Tumbler with Straw is made of double-wall stainless steel with a powder-coated matte finish that keeps beverages hot for up to 12 hours and cold for up to 24 hours. Comes with a clear plastic lid with a stainless steel straw and silicone sip hole in a cup-holder-friendly shape. Recommended hand wash only and should not be put in the microwave or freezer. Must be ordered in exact case quantities and may ship from CA location. FDA certified.