does the vase go right down into the silver casing? i.e is it 'footed' sort of where it indents at the bottom? I think there are Ruda bowls that have a 'foot' bit. Not saying it is Ruda, but just a thought that it may have been a bowl perhaps? how tall is it? Also I'm not sure that colour is a Czech 'colour' but could be wrong. But I do recall some discussion about a vase , I think called a 'pineapple' vase or something, that had triangular prunts/pattern on it. The discussion was about whether or not it was a Sklo Union vase if I recall correctly, and I think that might have been attributed to possibly having been German in the end - that might have been this blue type colour as well (there was definitely one in a green but think there might have been one in a dark blue :spls:).
m