Corning CoolBox Systems are bench top cooling systems that provide sample cooling or freezing without ice, electricity, or batteries. Versatile and accommodating to a variety of sample formats and temperatures, the CoolBox modular design enables the use of both Corning CoolRack and Corning CoolSink thermoconductive sample modules to hold microcentrfuge tubes, cryogenic vials, PCR tubes, or assay plates at a stable temperature while you work.