Hi again, I've been trying to pin these down

Anyone got any thoughts on the origins of this dainty coffee c&s?
duck egg blue glass with definite orange glow when held to strong light source, ground rims, clear glass handle, saucer is cased in clear glass and much thicker. Can't imagine the cups surviving much use!
thought they might be classed as demitasse but seem the wrong shape
cup is 7.5cm wide x 3.5 deep / saucer is 11cm wide x 2.5 cm deep / combined weight 133g
look forward to comments good or bad lol (but I like them)
cheers!
Mel