P212121

I had the opportunity to see these dewars by Spearlab at the 2007 American Crystallography Association meeting in Salt Lake City.
They have become quite popular, but for those that have missed them they are WAY better than Glass Dewars. Foam dewars are virtually indestructible compared to Glass Dewars and run about half the price.

The dewars are also being used in ways that I would have never expected such as a transfer vessels of liquid nitrogen. Spearlab also just came out with a new 1400 mL dewar cryogenic dewar, which is shaped like the purple dewars shown above.