Modular egg holders for the refrigerator with magnetic feet to click them together for stability. The holes in the feet fit 6mm x 3mm magnets (diameter/height). Magnets can easily be inserted after the print is finished. If you don't want to use magnets simply print a few of the connecting bits. Though if you put in magnets you can stick the small trays to the refrigerator if you don't need them at the moment. (The double is a bit too heavy for that since the magnets only go in the bottom tray but I might do a version with space for an extra magnet later)