- Ergonomic
- Support-free (though I recommend using an inner brim)
- Pressed-fit, no glue needed
- Recessed very slightly so the magnet, once inserted, does not come in contact with the item being held, or the fridge, to avoid scuffing/scratching. Only the plastic touches. Be sure to press the magnet all the way in.
- Fidget toy; if you put two together so that the magnets attract, it can be neat to play with.
There are two STLs, one for a tight fit and the other a little less tight that could use some glue.
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I used the following magnets:
https://theclassroomstore.com/products/Button_Magnets?option=31293&srsltid=AfmBOorTRh4MqyMuqQW5dvw1DxvtzyuJ3RJnApyVm70qs1lBgZEhP3HA3aE&gQT=1
ProMag Ceramic Magnets 19mm
I prefer these as they're cheap and just strong enough to work well, but not so strong that they hurt when they pinch your skin.