Actually, at the back of my garage, is a old-fashioned glass sweet jar, with some sloe gin that I made about 7 or 8 years ago, with the sloes still in it.
I keep meaning to do something with it.
By the way, what do you use to strain the berries and how do you get it "bright" ? I used to make wine in the 70's and it was always a bit of a rigmarole to get it looking really clear and bright. I seem to recall using coffee filter papers.
I use a very fine foil coffee filter that I got in France as my final strain (coarse sieve, fine sieve, filter). Then it stands and anything missed will sink to the bottom, pour off the top and then sieve and re-sieve the 'lees'.
I have used both muslin and paper filters but, being a Yorkshireman, didn't like the amount wasted by the filter absorbing it...
If you do leave it for a length of time it loses the 'Ribena' red colour and becomes more of a brandy brown.
I've made some on several occasions, gives a lovely warming glow.
Tip: Pick the sloes or damsons, after the first frosts in October (usually)and don't be tempted to use a cheap gin, the better the quality you put in, the better you get at the end!.
Give the jars a shake, whenever you're passing the cupboard, this will speed up the process and also help the sugar to dissolve.