This is a display rack for 2ml perfume samples.  My bottles have diameter 12.07mm and height 55mm.  The provided STL file is for 5 tiers of 8 bottles per tier, with a hole size of 12.5mm which makes placing the bottles easy with a little wiggle room.  The rack is hollowed to save material and allow placing a low energy light source inside (there is a cable run in the back to help with this).

I sliced with Cura, using lightning infill.  I printed in clear PLA, 0.4mm nozzle and 0.2mm layer height.  Adding a light really helps to see the labels on the clear perfume bottles and looks great in the dark.  If I was to print again I'd probably use a sparse cubic infill to provide better diffusion of the light source within.

The OpenSCAD file can be modified as necessary for the required number of tiers and bottles per tier.  I'd suggest initially setting tierCount = 1 and holesPerTier = 1 and doing a test print to test tolerances for your own perfume bottles.