Custom imprinted promotional logo 15 oz. Halo Stainless Steel Travel Mugs are patented design. Dual wall construction with 100% pure 18-8 stainless steel adhering to FDA guidelines. Foam insulted for optimum heat retention. Spill resistant lid with thumb slide closure and double wall design to keep lid cool. Non-skid bottom. These customized tumblers are excellent for your promotional advertising, school or personal event with your message of logo.