In Chillin' Brew panels, the PCM's change phases at the temperature right before your beer would freeze, which is our little secret. Therefore, they change phases just a tenth of a degree before that in order to maintain the coldest temperature possible. Our Arctic Ice material manipulates the temperature of your beer to constantly remain even colder than ice. In fact, our wicked smart engineering team has specifically designed Chillin' Brew panels to produce the coldest beer in the entire world! Whew, you passed Arctic Ice 101. You deserve a beer for sitting through that!