With the brand Cryo.s™ Greiner Bio-One combines more than 30 years of experience in the manufacturing of cryogenic tubes with latest technology and innovation.  Cryo.s™ may be used in combination with a variety of accessory boxes and racks for storing biological samples at ultra-low temperatures (e.g. in gas phase of liquid nitrogen). All tubes are guaranteed free of endotoxins, DNA, Dnase, Rnase; only virgin, medical grade, USP class VI certified, leachable-free polypropylene is used for the manufacturing of Cryo.s™.