By Cults on October 11, 2019 20:08
Hello, Today I share this holder I created. Had to print several in order to accomodate a donation of 29mm test tubes that my wife's school received. Hope it fits your need. They look nice, they print with a small ammount of filament, and are designed thinking in stability and avoiding liquid drops to remain in its surfaces. I printed them in PLA with 20% infill and no brim nor support.
3D file format: STL