Coffee Joulies are shiny metal beans that you drop in your coffee to quickly cool it to the right temperature and then hold it there for hours. The polished stainless steel shells are filled with a material that melts when submerged in hot coffee, absorbing the extra heat and bringing it to the perfect drinking temperature.
The Joulies store this initial blast of heat and slowly release it, maintaining a constant temperature of 140 degrees. Coffee Joulies are made in USA from 85% recycled stainless steel using hydro power from Niagara Falls.