The Nalgene® Dewar flask is ideal for short-term storage of ice water dry ice-solvent and liquid nitrogen. Chemical-resistant HDPE double walls are filled with CFC-free urethane foam and withstand temperatures from -196°C to +100°C. Vented insulated HDPE cover. It features molded-in ribs cover securing tabs pour spout and bottom grip area for added safety. Convenient polyethylene-coated bail-type handle. Shatterproof. Nalgene Dewar flasks are available in multiple sizes to choose from to suit your lab's specific need. Nalgene 4150 series.