Oxford 16 oz Stainless Steel/Polypropylene Tumbler with Straw has a stainless steel outer shell with black polypropylene inner lining that keeps beverages hot or cold for up to 3 hours. Tumbler comes with a metal straw and color matched silicone straw sleeve that is is food-grade.Wide-mouth lid is 100% BPA-free acrylic. Hand wash only. FDA certified.