In Das Bohmische Glas Band II page 175, there is a Karaffe in a similar colour with enamel and gilded painting in a similar style. The karaffe is cut and gilded. There is also a jug on page 174, blown glass not cut at all, in a 'normal footed jug style' (can't think how else to described the shape)with a plain foot. It too is ruby glass and has that white enamel and gilded decoration.
These come under the section titled Friedrich Egermanns Rubinatze und rubinierte Glaser.
They are
not attributed to Egermann though. They are both dated c. 1845- 1850 and attributed as 'Umgebung von Haida' (Near Haida).
I think the shape, cutting, foot and stem as well as the colour and decoration of your goblet is right for the 1840's from the clues in the books. I agree I don't think it would have had a lid. I'm not sure these pieces were for using? I suspect many of them were decorative because they were expensive to produce.
Out of interest:
Harrach did do that colour (or similar)- in From Neuwelt to the Whole World they show:
Page 93 a cut beaker 'after 1830
Page 100 a panel cut jug dated 'before 1835'
however nowhere in that book could I find anything with this white enamel gilded decoration in that style. (and I have looked for this type of enamel decoration many times before

) And I've not seen it attributed to Harrach anywhere in my other books either.
Also in Das Bohmische Glas Band II page 83 they show plate II.98 a becher in a similar red glass to yours id'd as Neuwelt 1835-1840 along with a couple of other pieces in the same red glass same dating.
I've seen that enamelling also on alabaster pieces (I know Keith has one such piece in blue).
Dredging my memory I seem to think that the style of the enamelling became a little more 'sophisticated' a bit later , although still the gilding on white, but at a slightly later date - so for example there is a turquoise blue alabaster tray on page 145 of Das Bohmische Glas Band 111 (Historismus) dated c. 1855 attributed 'Vermutlich Bohmerwald'. I can't really explain it very well but just the style of it is more sophisticated to my eye, the patterning is more closely done, more a definite pattern using a lot of the glass space, whereas my recall of what I think are earlier pieces with that enamelling, are of the enamelling a little more random or a little more spaced out on the glass. So I think I've seen it on earlier alabaster pieces where it is more random patterns and smaller 'scattered' designs.
So my instinct would say the spacing on yours fits with the ones in the book of 1845-50.
Pieces with that enamelling are around but there are not that many, especially in the books, and I don't recall seeing any with a specific
maker/decorator identified at all.
Modified:
I've just managed to find the one piece that I thought of re name (Vermutlich Adolfhutte bei Winterberg) - it's on page 144 of DBM Band II - Blue glass lidded pokal with that gilded white enamel decoration on it -dated 1845-1850.
and I have found an alabaster becher in DMB band II page 91 that has a more random decoration, is id'd as Neuwelt and 1842.
So I guess it is possible that Neuwelt could be a possibility for your becher perhaps - they did the red glass and that style of enamelling. I think the date of 1840's is right.
Is it at all possible to put up pictures of the base of the foot please? and also a close up picture of the gilded enamelling
m