A sleek, cylindrical vial with a slightly curved form, designed to fit comfortably in the hand. The glass is tinted a deep, translucent purple, giving it a mysterious and potent appearance. The vial is sealed with a metallic cap that has intricate tribal engravings, hinting at its ancient origins and the advanced alchemy of the post-apocalyptic world. The liquid inside shimmers faintly, suggesting its magical properties that enhance stealth.