I've handled two pieces of the Soda range and I was under the impression that these are all made with very thin glass?
The one I saw (unboxed) in a charity shop had ripples in the glass, I didn't mean your vase, sorry.
I think the one in the charity shop did have a bit of ware to the base and was dirty. I did not examine the boxed one's that I found to see if they were similar, I just presumed they were the same. :roll:
I think the box came with 6 or more vases.
Sorry, I can't be of more help.