Check the listing for details. 20 oz. Thermo-Serv Coffee Travel Mug - Black - New. Color: Black, Condition: New. Listed at 15.95 USD. A good coffee mug is like a comfortable pair of Jeans or your favorite boots – it just feels “right”. For years the 20 oz insulated mug was available at most Gas Stations and Convenience Stores. A few years ago they suddenly disappeared from the market and haven’t been seen since. Well, we found the mold and arranged for a special production run of mugs. These mugs are great. They are double wall insulated and unlike other mugs on the market, they are foam filled so they are far superior at keeping drinks hot or cold. These rugged mugs are both dishwasher and microwave safe. The lid snaps on tight and doesn’t leak out the sides like most of the Chinese imports! This mug is black with a black top. There is no printing or graphics on this mug.