One lid allows for sipping your beverage of choice while in motion, and the other seals tightly with one gasket and makes the vessel leak free. It holds about 16 oz. It is cylindrical in shape and didn't fit the drink holder in either of the family cars, so it isn't suitable for motor travel with the sipping lid. Let me explain. As you can see from the data presented in the graph below, the Mug keeps liquids hot for a good 6 hours.
Cold testing turns out to be a less strenuous test.
The differential in starting temperature and the ambient room temperature is not as wide in the cold test as it is in the hot test. The initial difference in the cold test is about 40 degrees fromthe ambient room temperature, but the initial difference in the hot test is 130 degrees. Liquids around 50 degrees still taste cool, and most home refrigerators cool to about 40 degrees. One way to extend the time liquids remain chilled is to toss in a couple of ice cubes in the mix. As long as there is ice floating around, the liquid stays around 33 degrees.