I have always made my own Raspberry Vinegar, it is an essential ingredient in Summer Salads.
Nothing could be simpler; a handful of Raspberries, white or red Vinegar, and sugar. Strain and bottle.
This year I had no Raspberries, so when I recently finished my last year's supply, I actually went out and bought a ready made bottle; something I haven't done for decades.
Then I had a brilliant idea; in the absence of fruit, why not simply add Raspberry Syrup (Sirop de Framboise) to red wine vinegar. Guess what... the resulting flavour is exactly the same.
And the best use for Raspberry Vinegar?... Well, it has to be on sliced Beetroot. Yummy.