I have just made something which I'm not supposed to eat until 2018. Pontack sauce, a historic, English concoction based on Elderberries. Once made, the sauce must be bottled, and kept for 7 years before opening. I’ll be 27 before I get to try it. Prior planning indeed.
Not knowing what Pontack sauce tastes like (and not being too keen on Elderberries at the best of times) I only picked a modist amount of berries, about 500g.