Found beside every sink and at the elbow of every water fountain, the glass of tap water is served without ceremony and consumed without memory. It has no brand, no tasting notes, no origin story beyond a municipal reservoir and several miles of galvanized pipe. Its temperature is whatever the building decided that morning. Its clarity ranges from museum grade to faintly opalescent, depending on a water main's mood.
In the field, it is best observed at kitchen sinks after midnight, where it performs its only trick: existing exactly long enough to be finished. It does not sweat in its glass like colder, more self-conscious beverages. It does not fizz. It asks nothing of you except that you drink it before it grows warm and starts to taste, faintly, of the glass itself. Naturalists have noted a curious property: the same water, poured into a fine tumbler, is received with more gratitude than when poured into a jam jar, though the water itself has not changed. This suggests the glass of tap water is less a beverage than a mirror, showing back to the drinker whatever ceremony they brought to it. Left alone, it evaporates without complaint, a small clear volunteer doing unglamorous, essential work.