20 oz. Polar Camel Travel Mug is double-wall vacuum insulated and features a clear lid for easy viewing. The mug's narrower bottom fits most standard cup holders, and its 18/8 gauge stainless steel (Type 304 Food Grade) offers twice the resistance to temperature changes as a standard mug. 3" x 3" laser engraving is included, with engraving visible in black or light gray/white.