P.S. I omitted the sugar. The cranberries are sweet enough; in my opinion.
I'm trying this tonight, but from experience, the acidity in the vinegar will help keep nasty stuff from growing; as long as it's refrigerated, it should last several days, or even up to a week.
Hey, fellow singleton-- how 'bout cutting the recipe in 1/3s (just one can of beans) the first time 'round? If you love it and can eat it every night for a week, you can go whole hog (or whole bean?) next time. With vinegar, it should be good for several days, I'd guess. And if you get tired of it, you can always mix it with rice or lettuce or throw it into a batch of soup. (I am the Leftovers QUEEN!)