How to store liquid nitrogen?

I need to do some work with liquid nitrogen at home. The main question is how to store it without buying huge vacuum flask specifically for liquid nitrogen. I've tried to use usual steel household vacuum bottles, added ~1 cm of extra insulation (some foamy material, multiple layers), wrapped in plastic to protect from condensation. read more

Liquid nitrogen is a diatomic liquid, which means that the diatomic character of the covalent N bonding in N 2 gas is retained after liquefaction. Liquid nitrogen is a cryogenic fluid that can cause rapid freezing on contact with living tissue. read more