The formulation is a water-soluble blend of essential oils for use post-flush, combining crisp notes of citrus peel with rich floral elements to effectively reduce and mask disagreeable smells-for strategic placement in home and office bathrooms. The idea for the drops came after surplus vials of Aesop's in-house laboratory's oils were placed in the lavatories for discreet use after vigorous activity. After much testing, essential oils of Tangerine Peel, Mandarin Peel and Ylang Ylang were chosen for their ability to perform the unenviable task at hand. | Aesop Post-Poo Drops, 100 ml | Dermstore