[DaveMakesStuff] uses 3D printed test tubes for plants and similar purposes, and he’s shared how to make them on a 3D printer, complete with different models each optimized for different nozzle sizes.

This is the beginning of a series on practical prints for your 3D printer. Lots of people have seen 3D printers in action, but many of the prints are what can best be called novelty prints. They're ...