Durable, double-wall stainless steel vacuum construction with copper insulation, which allows your beverage to stay cold for 48 hours and hot for at least 12 hours. The construction also prevents condensation on the outside of the bottle. Features on-trend, durable powder coating. Stainless steel, screw-on, spill resistant lid. Bottle opening diameter: 1.02''(25.9mm). Fits most standard car cup holders. 17oz.