This is a customizable Obento box. Obento boxes can run for [https://www.amazon.com/Kotobuki-2-Tiered-Rabbit-Cherry-Blossom/dp/B00CS1OGFY/ref=sr_1_12?keywords=obento+box&qid=1575953824&sr=8-12 $25] for a two tier box.
Creating a 50x90x20 mm Obento box will take 20 grams of PLA for the boxes and 14g for the separator and lid. In total the cost, assuming $20/kg, will be $1.08.
Depending on the size you can use it as a lunch container or a cute storage option.
With the separtor lid, you can have multiple storage boxs. The lids are snug fit, but a elastic band can be used for an added effect.
The obento box is customizable using the free open-source OpenSCAD program. STL files are also avaible as well.