the indented pontil scar would suggest C18 - but it could be half a century or more later, since we know untreated scars occur at various times in the C19 - perhaps impossible to be sure on items with a more utility use. My thoughts are that the wrythen moulding suggests it started life in a part-mould or dip mould of sorts, with the foot being added afterwards.
If the top comes off, would be useful to know if the external moulding can be detected at all internally, or if the inside is completely smooth.
Always possibly I suppose that it's free-blown and then given a twist, physically.
Do we definitely rule out muffineers or other shakers for granular condiments - they've been in use since the C18. Are there any stones/seeds in the glass?
However, it's an interesting piece.