Imprint Method: Unimprinted - Perfect for your favorite drink, the Igloo® 20 oz. Stainless Steel Tumbler and its 18/8 double wall steel construction and vacuum insulation will keep hot drinks hot for 6 hours and cold drinks cold for 24 hours. The push-in slider lid keeps your drink safe from spills and its slim design means it fits in most cup holders. Use the interior marks to measure a 1.5 oz. shot or 5 ounces of wine. This tumbler's durable powder coat finish keeps it sweat-proof provides protection from bumps and scrapes. FDA compliant and BPA free.