CryoKING Freezing Container, 2.0 mL, 18 Wells by Biologix is a polycarbonate tank with an HDPE cap and vial holder for isopropanol-based controlled-rate freezing of up to 18 cryovials from 1.0 to 2.0 mL in a -80 °C freezer before transfer to liquid nitrogen. Store it at room temperature between runs and refresh the isopropanol after five uses. Sold singly or 12 per case.