The heat transfer experts at ThermAvant Technologies, founded in 2007 by two University of Missouri engineering professors, have developed a wide range of oscillating heat pipes, liquid cold plates and other thermal management solutions. Now the Columbia, Mo., company has introduced a stainless steel tumbler that uses biobased phase change material to keep hot beverages at the optimal temperature.
The Lexo tumbler features three layers of 18/8 stainless steel and a BPA-free plastic lid. The 10-ounce version is selling for $37.95; a 16-ounce version will sell for $39.95. By comparison, Joeveo's 16-ounce Temperfect mug, available for preorder on Indiegogo, sells for $40. Ember Technologies' new Wi-Fi enabled temperature-adjustable mug, which employs PCM and a battery-powered heating system, sells for $149.95.
All three mugs use PCM to absorb the initial heat of coffee or tea and bring it to the optimal drinking temperature.
“Our mug takes about two minutes to cool to 140 degrees Fahrenheit, which is the optimal drinking temperature, and it stays there for up to eight hours,” said Dr. Bill Ma, the C.W. LaPierre Professor of Mechanical and Aerospace Engineering in the University of Missouri's College of Engineering.