Silverplate base for vase? Porter Brit 19th C.

I know the maker, Porter Britannia (or sometimes shown as Brittania) & Plate Co 1859-1870's (at least I'm sort of sure). What I'm wondering is just what it held and what it should have looked like in case I come across a likely insert.

It is about 7½" to the top of the decorative heads and is marked on the bottom Porter Brit & Plate Co 40.

Base for a glass celery vase? It seems a little big and bold for that but I really have no idea.

 

What is the opening diameter?
Also, it appears that the part that holds the glass is cupped, is that correct?

 

Yes the bottom glass holder is cupped with an interior diameter at the rim of about 3". The interior diameter of the upper ring is a bit over 3¼" diameter.

 

Might be part of a silver service. Sugar bowl, waste, I doubt a spooner.

Only pieces I could find for them have colored glass.
https://www.liveauctioneers.com/item/42392160_rare-american-historical-silver-plate-sugar-bowl-and

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http://www.rubylane.com/item/749799...tex20Cox2e/Porter-Britannia-Plate-Co-Ruby-Red

 

I had seen those and the lovely colored glass. I was wondering if the shape of the glass might be something like this one in general shape though this is Meriden said to be 10" high and a celery.

 

Coming back - a new look and what I see or don't see are handles on the three examples shown, but no handles on yours.

Once a glass insert is added, yours might very well stand 9-10" so I wouldn't rule out celery.

Guess I'm not helping much. Sorry.

 

Oh yes helping, I appreciate your thoughts so much! I also thought of lack of handles and it's got good weight. It looks so trophy like but perhaps that's just the Egyptian revival thing going on (at least in my head that's what I'm guessing).

I've looked at so many pictures of lovely silver and glass celery vases, spooners etc and while it's great fun I'm not really finding something that gives me the ah hah moment.

In my head I'm wondering if the shape of the glass should be something more like this but with more classical decoration if any. I'm pretty lost.