Most coffee drinkers would agree that a good cup of coffee should be had at any time, but they will likely also say that hot or cold coffee has a short ‘perfect temperature life’. Hot coffee must be hot, and ice coffee must be cold. To give our dedicated coffee lovers a cup suited to their needs, we created the Caleo coffee mug to best hold the coffee’s ideal temperature. Following our Caleo's design, the coffee mug in this series has a double wall application to maintain your dink's hot temperature while protecting your hands from the heat. The set of mugs are made of to withstand a temperature of up 350 degrees Fahrenheit; this heat can be from the microwave, the liquid itself, a dishwasher or even an oven!