Fascinating and beautiful beast - but I don't think it's use is for spaghetti.
It does however, look as if some sort of graal thing is going on in it perhaps?
I've seen one other thing (I think) which might have a similar sort of finish - a very old uranium glass bowl, with a gently raised opaque fleur-de-lys pattern around it - I don't know if the raising of the pattern is inside and out or not, it's a stunning piece - I believe it belongs to Leni.
I think I've also seen a flat, fan-shaped, footed piece in uranuim and opaque with a similar pattern on it - it looked quite Powell-y but that's not my area, and it may well not have been. It was a beauty, damaged, and still a tad on the expensive side for me!