I recently got some bar soap and didn't have a good way to store it so that it could drain off when wet without making a mess on the counter. Enter this tray. It has two pieces - a base and an insert. The insert makes use of specific settings in prusa slicer to use honeycomb infill without top or bottom layers - which basically gives you a honeycomb insert that allows the soap to drain when wet into the base - these settings are why this is uploaded as a .3mf instead of a .STL. When you want to clean it, simply run some water over the insert and clean out the base and then reassemble. Easy, simple.
Pictured tray was printed at 0.3mm layer height using a 0.6mm nozzle on an i3MK3s with Hatchbox PETG filament with a modified AmazonBasics filament profile. YMMV - you may need to adjust filament type, nozzle size, layer height, etc - but that is all pretty straightforward.
The author hasn't provided the model origin yet.