The Flame Free Thermo-Urn is a Service Ideas exclusive product, engineered to achieve true vacuum insulation that provides 6 Plus Hr Heat of heat retention with no external heat source. This economical design significantly reduces labor and supply costs and has the potential to save you hundreds of dollars a year. You could receive a return on your investment within a matter of months. Furthermore, without the need for direct heat, your coffee will taste fresh until the last cup is poured.