Stainless Steel Outer And Inner | Double Wall Construction For Insulation Of Hot Or Cold Liquids | Snap-On, Spill-Resistant Lid With 9" Straw | Due To Vacuum Insulation Technology, Capacity Is 18 Oz. With Lid On | Keeps Drinks Hot Or Cold Up To 6 Hours | Non-Slip Bottom | Meets FDA Requirements | BPA Free | Hand Wash Recommended | Lids and Str Packed Separately and Unassembled