Keep your beverages hot or cold and portable – in style!This bottle is made of double wall 18/8 grade stainless steel with vacuum insulation. The inner wall is plated with copper for ultimate conductivity to keep drinks hot for 12 hours and cold for 48 hours. Holds 17oz. This item is perfect for people on the go. The Copper Vacuum Insulated Bottle combines the great features of vacuum insulation with a screw-on lid for ultimate beverage insulation and portability!