1x1 Gridfinity Bic Lighter Holder.
Printed magnet bore side down with 2 walls, 4 top/bottom .04 nozzle .02 layer, 60c bed with 15% infill and used dry (ELEGOO MATTE BLACK PLA) with calibrated temp of 210c.
The author remixed this model.
Made bin solid then used ellipse for the bore