Coffee Beans Keep Your Coffee at the Perfect Temperature
Tired of burning your tongue on coffee or hot tea, only to have it get cold a few minutes later? With Coffee Joulies, your coffee will be ready to drink faster and will stay at the perfect temperature longer.
Each polished stainless steel shell is filled with an advanced phase change material that melts at 140°F. Put them in your hot coffee or tea and, like a whiskey stone in reverse, the material inside the Coffee Joulie starts to melt, absorbing the heat when the drink is too hot and cooling it down up to three times faster than normal.
When your coffee reaches the perfect temperature, the Joulie’s interior material begins to solidify, releasing the stored heat to keep your coffee at the optimum drinking temperature up to twice as long.