A simple but customisable box with mounts for magnets so you can stick it to your fridge or anything magnetic.
You can choose to have the mounting done by 1 to 5 magnets (3 is default) and you can customise it with your own text label if you want to.
It is possible to break the model of you choose a small box and big magnets. So have a look at the finished model before you decide to print it.
No support needed. I have added a +0.25 mm slack to the magnet hole. On my printer that makes them fit snuggly if I insert exact measures. Adjust the magnet size if it won't fit.
Glue the magnets in with your favourite adhesive. I prefer Tec7 for this. And for most of my boxes I use these magnets: http://www.banggood.com/20pcs-N52-Super-Strong-Round-Magnets-10mm-x-4mm-Rare-Earth-Neodymium-Magnets-p-998141.html