Stainless Steel Outer And Inner. Snap-On, Spill-Resistant Thumb-Slide Lid With Rubber Gasket. Keeps Drinks Hot Or Cold Up To 6 Hours. Double Wall Construction For Insulation Of Hot Or Cold Liquids. Due To Vacuum Insulation Technology, Capacity Is 18 Oz. With Lid On. Non-Slip Bottom. BPA Free. Hand Wash Recommended.
