Diristani Neurocoffee was a beverage. There were tariffs on its trade within Federation space in the late 23rd century.
During conversation, the Orion smuggler Ivra Kerav quizzed prospective clients on mercantile matters, such as tariffs on Diristani Neurocoffee, so he could satisfy himself that they were genuine rather than, for example, Starfleet investigators. (FASA RPG module: Orion Ruse)