Droppers, and solid perfume
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Perfume oil is the best served format here
Its shelf is 60 glass containers from about 15 to 120 mL with 186 closures, and 40 of those are dropper assemblies. That is a genuinely wide choice and the fit is already verified per neck.
Why a dropper suits it
An oil-based perfume is applied a drop or two at a time, so a controlled orifice is the difference between a usable product and a wasted one. A plain cap turns a precise product into a messy one.
And no alcohol means no permit and no hazard class
Which removes two of this property’s three problems. The materials question remains, because the fragrance concentrate itself attacks polymers, so the dropper bulb and the liner are still the parts to check.
Solid perfume, and the tin that is not there
The archetype is called a small tin. Its derived shelf is 47 containers from 7 to about 59 mL, of which 30 are PP and 17 are glass, and not one is metal. 18 double wall jars, 11 single wall, 9 straight sided.
The catalog does have tins
Twenty-nine of them, including 24 round steel from 7 to 355 mL, which the derivation does not place on this shelf. If a tin is your format, those are what exist and they are worth asking about.
A jar works for solid perfume too
It is filled warm and opened rather than dispensed, so a double wall jar makes a small fill feel substantial and is a common premium choice. The 47 containers on that shelf are not a bad answer, only a differently named one.
Filled warm means checking the temperature rating
Solid perfume is poured warm into the container, so the published maximum fill temperature is the field to read first, exactly as it is on the wax melt shelf. PP tolerates far more than PET does.