It's too big to use, so I would think ornamental for shape only. Acid etched cameo glass. I think the shape is that of a Turkish coffee cup with lid.
It's impeccably made - very top quality.
Each piece is very thick and heavy glass, the rim width is 5.5mm on the cup and the other pieces are the same.
The cup and lid together weigh 2lb or just under 1kg and the saucer weighs just under 1 1/4lb or 1/2 kg on it's own.
As a set it is 7 1/4" tall (18.5cm) with the plate determining the width of 6" (15.3cm).
The cup and lid are mold blown and cut at the rim, cut bevelled polished.
The saucer has a very large polished flat base.
So where was it made? Is it Turkish glass? (assuming Pasabahce? )or could it have been made by Moser for example? As far as I know it's not old. I estimate it could date between 1970s and now maybe but that's just an estimate.
The blue is not what I would call cobalt blue. It's slightly off and not purply.
And can anyone help with the inscription please? I’m very grateful if anyone can.
I've added a second set of photos below

Thanks for looking
m