from The Century Dictionary.
- noun A cup for drinking, made with a fixed cover over a part of its top, through which a small opening is made, allowing one to drink without dipping his mustache into the liquid.
Sorry, no etymologies found.
There was an eloquence to that waiting, laid-out table, the print of the family already gathered about it; the dynastic high chair, throne of each succeeding Kantor; an armchair drawn up before the paternal mustache-cup; the ordinary kitchen chair of Mannie Kantor, who spilled things, an oilcloth sort of bib dangling from its back; the little chair of Leon Kantor, cushioned in an old family album that raised his chin above the table.
-- Look at that pink mustache-cup over there on that little table!
Page 151 the old-fashioned mustache-cup to her sister, and that lady transferred it to Wakeman.
You were buying a mustache-cup -- there now, don't blush; perhaps it was slippers, or a smoking-cap.
You were buying a mustache-cup ” there now, don't blush; perhaps it was slippers, or a smoking-cap.