Coffee Joulies are shiny metal beans that let you drink hot coffee sooner and longer. The stainless steel beans are full of a special phase change material (PCM) that absorbs heat quickly – letting your coffee cool down to the perfect drinking temperature (140 degrees F). When the molten PCM solidifies again, it releases that energy back into the coffee and keeps it at the perfect temperature longer.
A set of 5 Joulies sells for $60 on the Joulies website. Or you can buy the magic Coffee Joulies beans at Amazon (see above). P.S. They also make Booze Joulies – the metal cubes keep a drink cool without watering it down. (A six-pack goes for $25).