Coffee Joulies are made of an "advanced phase change material" that absorbs excess heat in coffee, then slowly releases it back into the cup for a drink that can be nursed for up to five hours. Coffee Joulies founders David Jackson and David Petrillo appeared on Season 4 of “Shark Tank,” hoping a shark would invest $150,000 in exchange for 5% equity.

Jackson and Petrillo found success on “Shark Tank,” as four sharks (Kevin O'Leary, Lori Greiner, Robert Herjavec, and Daymond John) collectively gave the founders of Coffee Joulies $150,000 in return for $6 from every retail order and $3 from every wholesale order until the investment was recouped. After that, the Sharks would only receive $1 from every order.

Today, the entire inventory is sold out on Coffee Joulie’s website, and the most recent update to the brand's Facebook page was posted on September 14, 2017. The product is no longer available for purchase through Amazon, and the majority of reviews on the site contain gripes of trial and error, so it seems Coffee Joulies have faded away in today’s high-tech market.