[There is none, and it is made all the better for Alucard's knowledge of knowing what this is, trying not to give into it, and failing every time.]

...Ah, that explains a few things.

[Really how didn't he put two and two together?]

As for the jars, perhaps. The herbals that have been published recently haven't been incorrect about certain uses, so the material described within would at least have an air of practicality, even if most of it will be for appearance's sake.