Thank you all for your searching
and inspired ideas. I became a little distracted and now have my thinking cap on and cleared my thoughts.
I've revisited the original passage of text and I'm sure, 100%, that the glass referred to is an actual drinking glass because the text reads :
'Here is found in rich abundance the ancient costly ruby-glass, opal-glass, amethyst-glass, emerald-glass, saphire-glass. in short glass of the most different colours. - Here is a varied multitude of shapes. Drinking glasses of every kind, such as the now used broad and low Champagne-glass; the flat glass intended to cut through the mustache, which must not be moistened; the thou-drinkers' glass with two compartments and two necks; the mocking glass with the hollow, globe-formed bottom, whose contents must be emptied to the last drop, before the drinker can set it down without painting a red stain on the white cloth, and many others. - Table bells, knives and forks, spoons, pots, jugs...'So as you can see, the mustache glass is described under the section which specifically mentions drinking glasses, and is in the middle of the sentence buffeted either side by two drinking glass descriptions of other drinking receptacles, so there can be no wondering, as there would be if it was a description tagged on at the end of that sentence. And as you can see, knives, forks and spoons are described as such rather than as flatware and are listed separately in the next descriptive paragraph or section.
Also going back to Christine's quote from the book here below, which appears to be describing a different set of items but two clearly described as mustache goblets:
http://www.glassmessages.com/index.php/topic,61813.msg347806.html#msg347806'
Eight gold goblets, partly ornamented with the monogram of Frederik IV, partly engraved ornaments and are finished in an
exceedingly beautiful manner: notice particularly two shallow goblets {mustache's goblets), that are distinguishable from the extraordinary
taste and delicacy of their ornamentation.'
this is on page 70 of that document
So now, having re-examined it all, I am certain we have a drinking glass described as ' the flat glass intended to cut through the mustache, which must not be moistened;'
And I am looking for a mustache glass, which is a drinking glass, which is described as a flat glass and is a particularly shallow goblet
Thank you all
m