The Bento Box was originally developed as a tool tray/storage device for the Repbox TT/FFC cabinet (https://www.repkord.com/collections/repbox-2/products/new-repbox-turntable-filament-filing-cabinet-v2), but we've found them very handy for other applications around the shop.
If you don't want to print your own we have a laser-cut kit version available here: https://www.repkord.com/products/repbox-bento-box
These files work well with PETG. Once the parts are printed, the IBeams are inserted into the alignment slots on the bins with the top of the print (open end) facing downward leaving the first layer (solid) facing up (see IMG 4). The Anchors are pressed into the Outers and will act as feet and alignment features when they are stacked.
We have also posted some of our initial printable add-ons for the Bento Box - https://www.printables.com/model/426040-repkord-bento-inserts.
The author marked this model as their own original creation.