• Controlled-rate alcohol-free cell freezing container provides a highly reproducible -1℃/minute freezing rate when placed in a -80℃ freezer.
• The insulative outer housing and thermo-conductive solid state core ensure consistent heat removal to all vials throughout the freezing period.
• Unbreakable, open easily when frozen, and are not cold to the touch when frozen - no "frosty" fingers.

Good choice for the environment since you eliminate the need for isopropanol for this application