cuvette lid
thingiverse
They made this thing with Tinkercad, editing it online at https://www.tinkercad.com/things/fezo8x6sACI. My students constantly misplace these lids. I often purchase a box of cuvettes and forget that the lids are sold separately. Now I can print my own lids for a standard disposable cuvette.
Download Model from thingiverse
With this file you will be able to print cuvette lid with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on cuvette lid.