"I use this kombucha heat mat when I go to bottle my kombucha tea. I find that the extra heat on the bottled kombucha keeps the yeast active to eat the sugar and create that extra fizz in a shorter period of time". (5 stars) Stan C. ,Customer Review * Ensure your kombucha is brewing at optimal temperatures for successful brewing * Intricate heating pattern allows for consistent and even heat distribution * Instructional video entitled "How to get the most out of your kombucha heating mat to ensure for perfect kombucha tea every single time" * UL safety listed an energy efficient - only 17 Watts! Comes with 1 Year Hassle Free Guarantee - All UL Listed Components