Custom imprinted promotional logo 16 oz. Stainless Steel Indent Tumblers are made of dual wall Japanese 18-8 stainless steel construction. Foam insulated for optimum heat retention. Spill resistant lid with thumb slide closure and double wall design to keep lid cool. Non-skid bottom. Exclusive patented design. Quality tested for lasting performance. These promotional logo mugs are excellent way to advertise your company.