Cool Cube™ PCM coolers passively control the temperature of cargo for an extended period of time (in most cases days!). Six removable panels utilize PCM technology to eliminate the use of ice or electricity, and make maintaining the cold chain easy, safe, and effective. During extremely hot conditions, a Cool Cube™ excels at keeping sensitive product at the needed temperature. But it can also keep product from freezing in dreadfully cold environments. Refrigerated, frozen and controlled room temperature variations available.