The Burning Cup from designer Ryan Jongwoo Choi will keep your coffee piping hot. The cup was designed to conserve energy by using sodium acetate, a chemical that turns to a liquid form when heated. The beverage heats up the sodium acetate, and the user is able to press a button to reactivate the sodium acetate to warm up the mug.
What do you think of the Burning Cup? Of course, you could always avoid brewing the beverage and use an aeroshot for a caffeine boost.