All stainless steel product with silicone gasket. Durable, powder spray coating. Double-wall stainless steel vacuum construction with copper insulation, which allows your beverage to stay cold for 48 hours and at least 12 hours for hot beverages. The construction also prevents condensation on the outside of the bottle. Durable, screw-on, spill proof lid with easy carry metal handle. Wide mouth opening for easy cleaning and filling. 20oz.