Built to keep you hydrated all day, this Igloo Double Wall Vacuum Insulated Tumbler offers a large 40 oz. capacity and its double wall, 18/8 stainless steel vacuum insulated construction keeps your drink hot for 18 hours and cold for 36 hours. Thoughtfully designed, its leak-proof flip n' sip threaded lid provides a large opening for convenient cleaning and filling, a small opening for sipping and an integrated carry handle. The thumb grip indent makes it comfortable to hold, the narrow base fits into standard car cup holders and its built-in silicone coaster protects the tumbler and surfaces from bumps and scratches. FDA compliant and BPA free.