Square Token Tray for magnets

I wanted token trays for my boardgames that i can connect together with 5x1mm magnets.
The square shape is used in order to create easily different divisions. That was the only way to cut out things with rounded edges in TINKERCAD that i have used for this.

Size: 100x100x19 mm
The trays are stackable
Magnets diameter 5 x 1 mm