Small 35 mL dual wall vessel for liquid nitrogen

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 insul