20oz Skinny Straight Tumbler is made using sublimation which creates a smooth, glossy, permanent finish.  Stainless Steel double-walled vacuum provides a good ability of insulation to ensure beverage stay hot for 6+ hours or cold for 12+ hours. This 20oz travel tumbler is made of high-grade 304 Food Grade Lead Free Stainless Steel. The eco-friendly lid is BPA free; silica gasket seals to achieve maximum spill proof capability. The splash proof sliding cover is straw friendly. It is very great for your daily commute, as well as the office, at the beach, pool, picnic, hiking, outdoor sporting events, tailgate parties, camping and more.