Customizable Perfume Bottle Rack

My wife got an assortment of perfume samplers from a company called "Commodity Fragrances" but had no good way to store them. They are small spray bottles with no caps, so she needed a way to keep them out of trouble.

I whipped up this parameterized multi-tier holder and thought it might work well for others. The tiers are offset from each other to keep the labels readable, and to allow multiple racks to nest up against one another, if needed.