On a space station this size, I'm not sure it's a feature - especially if it starts being used for a more varied selection of consumable liquids than just coffee.
Speaking of, how do they manage smells up there? Is "ISS smell management" someone's job at NASA?
They have filters in the air cycling that I assume include some sort of carbon filter for smell. However, astronauts have definitely noted that the ISS has "a smell"
Makes me wonder in how far you can actually. Wouldn’t the smell molecules also more or less stay roughly in the same space without convection and gravity playing their part?
They still have airflow on the space station. And since brownian motion does a fine job of spreading smells up against gravity on earth, I would guess that it works ok in space too.