Stainless Steel Outer And Plastic Inner Liner, Snap-On, Spill-Resistant Thumb-Slide Lid, Double Wall Construction For Insulation Of Hot Or Cold Liquids, Cork-Look Rubberized Base Protects Surfaces From Heat And Scratches, Due To Vacuum Insulation Technology, Capacity Is 18 Oz. With Lid On, Meets F-D-A Requirements, BPA Free, Hand Wash Recommended