I felt the need for a storage system for my screw set boxes.

Each tray is 26mm high and can fit most screw kits you find on aliexpress.

You can print as many trays as you like and stack them on top of each other. The material strength being the limit here.

There is a 2mm hole in each tray to thread a 1.75mm filament that will secure all your trays from detaching from each other :)

EDIT: V2 was added to correct remove non-printable hole at the bottom of the tray for the filament lock guide. Instead only 0.5mm chamfer was added to simplify insertion :-)

Optionnaly you can add a gridfinity bottom plate to secure it to you workbench and allows carrying the shelf around. Secure it with M2 screws and nuts :)