A customizable .scad file for generating a rack with round or square holes. This was designed with cuvettes and vials in mind, but should be useful for any number of things.
Update: Now fully customizable, simpler, all in one .scad code. (If you are looking for the customizable cuvette and vial racks I used to have up, this is the place.)
For a custom rack: Open in customizer!
For a 5x2 rack of 1cm path-length cuvettes:
You can probably just download the example .stl (cuvrack_5x2.stl) file and print that.
I've also included a .stl file (vialrack_1dram_5x5.stl) for a 5x5 grid of 1 dram vials (I think it should work, I haven't actually tried one.)
Reminder: Be mindful of how resistant your rack is to the contents of the cuvettes/vials. (Depending on what you make the rack out of, and what you have stored in the cuvettes/vials.)
Shameless plug: 'cuvrack_5x2.stl' fits nicely with this thing: