This is a minimalist holder for Melitta #2 coffee filters. Unlike my other model [ https://www.printables.com/model/293972-coffee-filter-holder-for-melita-2 ] this one needs magnets to stick it up on relevant surface as it does not have a base. The holes are made for 6x3 mm magnets.

I designed this to use least amount of filament, and it can be printed without supports. There are a couple of overhangs, but should work fine on a fine tuned printer. I have also added a slicer screenshot to suggest the positioning for printing without support. 

As of now my printer needs some tuning , and its visible in the printed model screenshots.