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