Stackable Painters Pyramids

I added a bunch of 10mm x 3mm holes in the back of the holder.  Depending on how many pyramids you store you might need some.  Slicers can now allow you to plug the holes and make new ones to whatever size magnets you have.  The back of the holder is 5mm thick.

5/23/25 Made version 4 so it matches better with the cutouts in the bottom so they can nest together in use.

I just tried it and six 10mmx2.5 mm magnets will hold the holder and 25 pyramids up.