Customizable lid organizer

We've switched to using exclusively Emsa containers for leftovers in our kitchen, as they are excellent quality. This resulted in a bunch of similar-looking lids randomly tossed in a box. To organize the lids, I made these holders, but of course made them customizable to allow for use with other (inferior) lids.

The included STL file fits inside my box when I put 4 of them in there, but your box is almost assuredly not the same size, so measure carefully and customize before you print.