That would be coupling a syringe and a substance. You want to have them as separate inventory items. There's also the lyophilization[0] aspect, or water remova

That would be coupling a syringe and a substance. You want to have them as separate inventory items. There's also the lyophilization[0] aspect, or water removal by sublimation, to dramatically increase the shelf life of the substances. It is a thing of beauty. [0]: https://en.wikipedia.org/wiki/Freeze-drying https://en.wikipedia.org/wiki/Freeze-drying