Small 35 mL dual wall vessel for liquid nitrogen by austinov

Last crawled date: 3 years, 1 month ago

This is a small 35 mL dual wall vessel which shows pretty good thermal resistance. To make it 3D printable, I added a small support in the center, so the printer makes two perimeters at once. One support was not enough however to hold the internal cup during the printing, so I added another circular support in the middle.
Planning to try making real 3D printable Dewar flask (aka Thermos), with vacuum between the walls. But even with the air there, the vessel provides pretty good thermal insulation.
On the photo, there is liquid nitrogen inside the cup - the surface is cold, maybe below zero centigrade, but I did not get a frostbite after holding it for 10-15 min which it takes for the N2 to evaporate completely.
Useful as a tiny cooling/heating bath for lab.