The point of OP’s question is clear. He’s referring to a drink that has sensory qualities that are clearly distinct from plain water. Water with a spritz of lemon still reads as water. As a loose guideline this is like anything you’d order as “water with x” or “x water”, like cucumber water. Coffee clearly doesn’t fit into that category, it has sensory qualities that are very different than water with x in it.
The point of OP’s question is clear. He’s referring to a drink that has sensory qualities that are clearly distinct from plain water. Water with a spritz of lemon still reads as water. As a loose guideline this is like anything you’d order as “water with x” or “x water”, like cucumber water. Coffee clearly doesn’t fit into that category, it has sensory qualities that are very different than water with x in it.
Speak for yourself. “Cucumber water” does not have the same “sensory qualities” as water unless taste doesn’t count as a sense.