Dry Erase Marker Holder (with magnet slots)

I designed this marker holder after seeing thing 2738817 by roastedsilicon.
https://www.thingiverse.com/thing:2738817

I like the design but wanted to include slots for magnets so I could stick it to my white board at work without having to use adhesive strips. Designed to fit 4 standard expo markers. and be printing back to the bed.

I also included text on the front face saying "Return Your Marker!!!" to remind people because our conference rooms are always running out of markers.

Note