This is a slightly bigger version of the popular standard vessel. The price per unit of the large foam dewar is $170. Dimensions of the cylindrical cavity in this vessel are 6.3 inches in diameter by 3.8 inches deep, so that it easily holds 1400 ml of liquid nitrogen.
 
Spearlab foam dewars are effective and durable vessels for handling liquid nitrogen and cryogenic materials. They have gained acceptance as the preferred containers for x-ray crystallography samples, and also are used in a wide variety of other cryogenic applications. Unlike conventional glass and stainless steel Dewar flasks which depend upon a vacuum layer for insulation, Spearlab foam dewars use a fine closed cell foam for insulation. This foam material is chemically inert and mechanically durable enough to be exposed directly to liquid nitrogen, without leaking or degrading.