Small 35 mL dual wall vessel for liquid nitrogen

thingiverse

This compact 35-mL dual-wall vessel boasts excellent thermal resistance. To ensure its 3D printability, I strategically added a central support, prompting the printer to create two perimeters simultaneously. Despite this addition, a single support proved insufficient to hold the internal cup in place during printing, necessitating an additional circular support in the middle. My next project involves crafting a genuine 3D printable Dewar flask – commonly known as a Thermos – featuring a vacuum-sealed gap between its walls. Although air is still present within this design, the vessel still manages to provide remarkable thermal insulation. A photograph taken of this vessel showcases liquid nitrogen held inside the cup; even at extreme temperatures, the surface remains chilled, with some areas likely below zero degrees centigrade. Impressively, holding the vessel for 10-15 minutes did not cause any frostbite issues – a testament to its thermal resistance – until the N2 completely evaporated. This diminutive cooling/heating bath demonstrates great potential as a handy tool in lab settings.