All of the double wall stainless steel lined Thermos Nissan products you will find at BaldMountainCoffee.com, are top of the line Thermos Nissan, which include the Thermos TherMax™ vacuum insulation technology. We do not carry Thermos Nissan products that are insulated with foam. Although Thermos does manufacture other, less expensive lines of products that do not include their TherMax™ technology, we carry only only Nissan Thermos products that DO include TherMax™ technology, as we feel they are far superior to what else is offered.