Lab grade dewars. Made from borosilicate glass and vacuumed to 10-7 torr, without pads between walls, eliminating heat transfer for maximum efficiency. They come with low evaporation stopper and weighted base.
Spherical Dewar Flask
Metal Casting does not extend the full length of the flask. Florence flask design, offers the most efficient way of holding liquid nitrogen. Available with an optional Fiber Glass Caddie for safety, easy carrying, and decanting liquids from the above flasks.