Fridge or Whiteboard container
thingiverse
Instead of embedding a magnet or gluing one to the back, this is designed to be attached to your fridge or whiteboard using an existing magnet. I've included two versions; one which has a flat back and the other has a subtle curve to it (with an 800mm radius) which might match the contour of your fridge better.
Download Model from thingiverse
With this file you will be able to print Fridge or Whiteboard container with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Fridge or Whiteboard container.