Customized Tumblers & Travel Mugs, Esen 18 oz Double Wall Stainless Steel Vacuum Tumbler with Copper Lining - 10Hr Hot & 18Hr Cold, The Esen 18 oz 18/8 double wall stainless steel vacuum tumbler with copper lining keeps your beverage hot for 10 hours or cold for 18 hours. It has a flip top drinking cover, rugged powder coated finish and is convenient to use when driving or working out. FDA compliant and BPA free. ... #KM7403 $17.95/each.