Antimicrobial 20 oz Double Wall Stainless Steel Tumbler construction for hot or cold drinks for up to 6 hours. Includes spill-resistant slide action lid with rubber gasket. This drinkware features an antimicrobial additive that prevents the growth and spread of bacteria on the lid & exterior. Neutralizes over 99% of active bacteria. FDA compliant, BPA Free and antimicrobial ASTM E 2180-18 standard testing for rubberized finish & lid of the product. Hand wash only.