A coffee machine with a thermos let's you keep your coffee warm for a longer period of time. Convenient, because this lets you simply place the thermos on your breakfast table. When choosing a coffee machine with thermos, pay attention to the capacity of the water tank in liters. Do you have a large family, or do you entertain guests often? Go for a coffee machine with a large water tank. This lets you brew a large amount of coffee in one go.