Stainless Steel Outer And Inner | Double Wall Construction For Insulation Of Hot And Cold Liquids | Screw On, Spill-Resistant Lid | Wide Mouth Opening | Vacuum Insulated | Antimicrobial Properties Built In To Protect The Product. This Product Does Not Protect Users Or Others Against Bacteria, Viruses, Germs Or Other Disease Organisms. | Keeps Drinks Cold Up To 24 Hours And Hot Up To 12 Hours | Hand Wash Recommended | BPA Free | Meets FDA Requirements