Test Tube Holder

Test Tube / Single Dose Coffee Holder

Update 14 April 2026:
[uploaded photos and STL files]
It's been a while since I worked on this. I am pretty sure that the STL tube_holder_newer.stl is the wider version for 30 mm diameter test tubes and the other one is for 25 mm wide tubes. If in doubt, edit the source file (test_tubes.scad) to your exact dimensions. You need OpenSCAD and minimal programming experience (or an LLM) to get you there :-)