Tested to be water tight, also after folding some 10-20 times. Quite small in the STL file (30mm tall, 30 mm diameter in top). Change height/diameter in included FreeCAD file to scale up nicely (if scalling whole model, might become too stiff to fold nicely)
WIP:
Print in NinjaFlex, or similar flexible material.
| cup-collapsible-4.stl | 213.6KB | |
| cup-collapsible.fcstd | 26.6KB |
