These Dewars permit operations not practical with standard dewars
- Small flasks can be inserted into Dewars
- Rapid freezing and recovery of tissue/organ specimens
- Agitation can be provided with a magnetic stirrer
These Dewar flasks expand the applications of standard cylindrical or spherical Dewars. The protective aluminum base on both sides extends the full height of the Dewars. Protected vacuum tip-off tubulations are off to the side to minimize space between the bottoms and magnetic stirrers.