But drinking vinegars have actually been around for some time. They're quite popular in Asia. And they've part of an old-timey drink called a shrub.
Blossom Vinegars is a local business making vinegars of all sorts, including the drinking variety. The owner sells at my local farmer's market. The DH and I brought home a bottle of the Wildflower Honey Cherry drinking vinegar. When 2 Tbsp are mixed with 6-8 ounces of sparkling water, it makes a refreshing drink! It's a nice balance of tart and sweet, and very refreshing.
Have you heard of drinking vinegars? Tried them?