Premium Quality Matte Finished, Stainless Steel Engraved Beverage Holder. Available in 16 Colors! They are permanently laser engraved in our Indiana workshop for years of enjoyment. Will not peel, flake, or otherwise degrade over time. DOUBLE WALL VACUUM INSULATED: Made with high quality 304 18/8 food-grade stainless steel, the double-walled insulation will keep your drink ice cold for 9 hours or hot for over 3 hours! The insulated tumbler with lid is lightweight, sweatproof, and rustproof. See our other listings for engraved tumblers, stemless wine tumblers, and coffee mugs!