30 oz 18/8 Stainless Steel Tumbler. Double wall copper lined vacuum sealed insulated. Keeps drinks hot or cold for 6 hours. Fits in car drink holders. Stainless steel outer and inner construction. Spill resistant lid with gasket and sip hole. Meets FDA requirements. BPA free. Hand wash recommended. Do not microwave. No seams on the interior. Tumbler can be laser engraved or screen printed.