1950s Style Test Tube Rack. Traditionally made of pine. Plausibly could be printed with wood filament. Referenced in the banned DIY science book: The Golden Book of Chemistry Experiments.
Shout Out: Thanks to Tibor Orsos for the nice rendering from the GrabCAD Community! :)
V3: Fixed an alignment issue. Added Grooves to make it buildable from actual wood. Work in Progress.