Stainless Steel Outer And Inner | Double Wall Construction For Insulation Of Hot Or Cold Liquids | Vacuum Insulated Capacity Is 22 Oz. With Lid On | Snap-On, Spill-Resistant Flip Top Lid with Straw Hole and Matching 9 1/2" Straw | Non-Slip Bottom | Meets FDA Requirements | BPA Free | Hand Wash Recommended