CoolBox CFT30 System eliminates the risk of ice contamination and provides hours of ice-free cooling or freezing for 1.0 or 2.0 mL cryogenic vials, with consistent and uniform well-to-well temperature. The contoured well design of the CoolRack CFT30 cryogenic vial module grips each vial and allows one-hand opening and closing, further minimizing contact with the vials that may result in temperature fluctuations. Each system comes with a highly insulative and durable HDPE base and lid, one cooling cartridge that is comprised of a phase-change solution in a thermo-conductive housing, and a CoolRack CFT30 module to hold up to 30 x 1.5ml or 2.0 ml cryogenic vials. Also included is an insulator pad to protect the exposed surface of the CoolRack CFT30 module from ambient temperature for maximum cooling duration.