The holder provides space to stack twelve lids of yoghurt containers lids in two stacks of six. It solves the minor inconvenience of storing the lids util you cook the next yoghurt-batch, while you finish eating the yogurt containers one-by-one.
The lids are part of the Proline Yoghurt Maker YM12F and have a 66mm diameter, but this can be resized to fit other lids if needed (Fusion 360 file included).
The m3f-file exported from PrusaSlicer contains the meshmodifier removing selectively removing the top and bottom layer to create a see-through grid pattern in the base by exposing the infill pattern (tutorial used).
The author hasn't provided the model origin yet.