Stainless Steel Outer And Inner, Powder Coated Finish, Double Wall Construction For Insulation Of Hot Or Cold Liquids, Vacuum Insulated, Snap On, Spill-Resistant Double Wall Lid With 10" Straw, Silicone Flip On Lid Covers Straw Hole When Not In Use, Meets F-D-A Requirements, BPA Free, Hand Wash Recommended