Had a need to get a pill box in a relative hurry and not much filament left but wanted the individual lids that original model provided so, I reduced the wall thicknesses to remove any infill. Also reducing internal height by 5mm as didn't need that much height.
The author remixed this model.
Saved 20g of filament and reduced the print time without changing the lids, walls are slightly thinner but maintains the strength, I also reduced the internal height by 5mm as original model was a bit deeper than required other internal dimensions are the same