[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.

3D printers are affordable enough that almost anyone can buy one, but should you? Before you dive in, here's what to consider—about materials, possible uses, software, and much more. Since 2004, I ...