Nalgene 4150-2000 Dewar Flasks, High-Density Polyethylene

. All-plastic Dewar flask suitable for cryogenic work. They are manufactured for use with liquid nitrogen (LN2) and ideal for use with liquid gases. Safe for use with liquid nitrogen, dry ice solvent, and hot baths. Chemical-resistant HDPE double walls are filled with CFC-free urethane foam and withstand temperatures from ?196