Cryogenic storage dewar also known as a specialized vacuum flask is needed to hold and store liquid nitrogen.
A dewar is designed for the sole purpose of holding extremely cold liquids below the freezing point of water.
Widely used for medical and scientific purposes: For the conservation of semen, embryos, spawn, vaccines, skin, organ and other biological material.
For industrial cryogenic processing, cold assembly, instruments and components of cooling, cold therapy etc.

Parameter
Capacity:3L
Static Holding Time (Days): 35
Material : Aluminum Alloy
Mouth Diameter (mm): 50
Outer Diameter (mm) :224
Vessel Height (mm): 450
Number of Canisters: 3 pcs

Capacity:6L
Static Holding Time (Days): 65
Material : Aluminum Alloy
Mouth Diameter (mm): 50
Outer Diameter (mm) :284
Vessel Height(mm): 504
Number of Canisters: 3 pcs

Capacity:10L
Static Holding Time (Days): 105
Material : Aluminum Alloy
Mouth Diameter (mm): 50(1.97 inch)
Outer Diameter (mm) :304(11.97 inch)
Vessel Height (mm): 550(21.65 inch)
Number of Canisters: 3 pcs

Note: This cryogenic container ships empty.
It can be filled anywhere that supplies liquid nitrogen,
but some places may ask you to sign a liability waiver before they fill it.