High density polyethylene Dewar flasks, polyethylene covers with polyethylene coated handle. Unbreakable and absolutely safe for handling ice water, dry ice-solvent mixtures, hot water baths and liquid nitrogen. Chemical-resistant HDPE double-walls filled with urethane foam, withstand temperatures from -196 to +100°C. Ventilated, insulating cover, 1, 2 and 4 liter sizes with carrying handle. 10 liter size without handle.