Superior grade 18-8 304 stainless steel vacuum insulated construction Copper coating on the outside of inner steel wall adds a 3rd layer of insulation Upscale polished steel accents Dual function lid: Drink through the lid or use the built-in sip through straw When fully closed lid is 100% spill proof Large carry handle built into to the lid Sleek tapered design fits most cup holders Made with 100% BPA free materials Keeps hot or cold for hours Includes gift box