Burnout was developed by a group of aerospace thermal engineers as you know if you have ever drunk out of a vacuum mug they stay hot for a very long time and you end up burning your tongue as you need the coffee to wake up on your way to work. Burnout brings it to optimal drinking temperature in minutes and at a constant temperature for several hours as the dual chamber design, two chambers configured from three layers of 18/8 stainless steel. The first is an aerospace-grade vacuum chamber to the outside of the mug, while the second chamber resides to the inside of the mug and is filled with HeatZorb, a special wax-like, bio-based substance that quickly absorbs and stores the heat from the coffee, bringing it to optimal drinking temperature (approximately 140°F) in just minutes.