Cryo Vials and Cryo Vial Racks, Holders, and Boxes CryoVial® Specially Formulated Polypropylene, is certified Rnase-free, Dnase-free, Pyrogen-free, and DNA-free. Designed for storage of biological material, human or animal cells, at temperatures as low as -190°C. The cap features a long skirt for one hand aseptic technique.