apologies, my explanations lacked clarity. My use of the word Bohemian, was down to the fact that much glass produced currently in that part of the world is still described as such - rather than Czechoslovakian - which is probably where this might have been made ......... but to some extent I'm guessing, and it might have been made in another eastern European country. My complaint about using the word Bohemia is due to the fact that technically it disappeared around the end of WW I, when much of that part of Europe was carved up to avoid what was perceived as a potential repeat of the problems, plus some appeasement and thanks to the Czechs and Slovaks who had apparently assisted the allies during the conflict.
In very simplified form, Bohemia, Moravia and Austrian Silesia went into making up the newly created Czechoslovakia. Unfortunately, it's vastly more complicated than that, and some of Czechoslovakia was acceded to Germany in the 1930s - some to Hungary and some to Poland.
The reason why the word is still used is due to the perceived historical high quality of glass from what was originally Bohemia, which still confers a cache simply by use of the word. I wasn't suggesting your pieces was C19 i.e. from the period of genuine Bohemian output - sorry for the confusion - your piece is very much C20.
As a general principle, glass has reduced in thickness over the centuries (apart from Venetian

), and this is noticable in such things as goblets and other drinking glasses, which if C19 are seen with thick walls and often heavy shaped feet/bases.
I also wasn't suggesting your piece was etched - and you're correct in saying it isn't. I think what I was trying to say was that sometimes flashed glass has its top colour 'etched on' - etched onto the clear body - but quite what I meant by that now escapes me - I need to look it up 'in a book'

, but acid was used somewhere along the line to act as some form of mordant on the clear part, perhaps. You're correct in saying your clear 'windows' have been cut on a wheel.
In the U.K. there is a tradition that usually goblets have a stem, whereas beakers, mugs, cans and cups do not - but that might just be our take on things. Think I'll go with a beaker or can, but in truth I'd suggest this was never intended for use, and was designed purely as a decorative piece.
As for date - and assuming there is almost zero wear, then I'd suggest last third of C20 - but dating can be a minefield for the unwarry - though like you I think it's quite modern and doesn't deserve a place in a museum

P.S. we do usually need to see the underside of the foot of your glass - it can help to decide if the piece was blown or mould made. Yours was probably blown in the sense that the base is probably ground and polished flat to remove any roughness where the piece was attached to the pontil rod. More often than not, Continental glass will also have its top rim ground and bevelled to remove irregularity created by the blowing process, as opposed to British made glass which is fire polished at the rim - this latter method is presumably quicker and easier, and requires less skill. Fire polishing requires that the base of the glass is attached to the pontil rod, and the whole item then held briefly at the glory hole (the furnace) whilst the heat melts/plastices the rim to a slightly rounded and smooth contour. Afterwards the piece is snapped away from the rod and the resulting scar is ground/polished, which gives the tell-tale depression under the foot.
Your piece may not necessarily have been free blown - read man/woman elevating the blowing iron whilst blowing - the outline shape may have been blown into a mould to create the basic shape.