Cryo 1°C Freezing Container, “Mr. Frosty”, clear PC body, blue HDPE closure, white HDPE vial holder, foam insert Provides the critical, repeatable -1°C/minute cooling rate required for successful cell cryopreservation and recovery. Requires only 100% isopropyl alcohol and mechanical freezer. Labeled with graphic, step-by-step instructions. Holds up to 18 vials. Holder prevents vials from contacting alcohol – no contamination by wicking, no removal of labels or printing on vials. Containers with alcohol can be stored at room temperature, saving freezer space. . Use with Nalgene Cryogenec Vials: 1.0,1.2, 1.5, 2.0 ml . Closure size: 120 mm Dimensions, H x Dia.: 86 x 117 cm Dimensions, H x Dia.: 3-7/16 x 4-5/8 inch . A table with cooling rates is shown in NALGENE CryopreservationManual or on NALGENE-Web-page). . . . WARNING! NALGENE Cryogenic vials are for research use only, not for in vitro diagnosis or parenterals. . WARNING! ONLY for use in gas phase of liquid nitrogen. Do not use cryogenic vials for storage in the liquid phase of liquid nitrogen. Such use may cause entrapment of liquefied nitrogen inside the vial and lead to pressure build-up resulting in possible explosion or biohazard release. Use appropriate safety procedures as outlined in the NALGENE Cryopreservation Manual (PDF-file or Lit. No. 10096) when handling and disposing of vials.