This is a 1x1 Gridfinity bin for heat-set insert soldering iron tips. Specifically this set of tips which fits my X-Tronic 3020 soldering iron, among others.
I found a bin that I liked, but it was made for Pinecil tips and turned out not to fit two of mine, so I remixed it to fit, and also added labels via a text modifier in the slicer.
To get the labels a different color, add a color change in the slicer on the layer where the labels start. The provided .3mf file already has the color change.
I've also provided a version with no labels, with a STEP file.
The author remixed this model.