Shih-Chuan Grape Vinegar

Water, grape juice, fructose, and fermented vinegar are the only ingredients in this pouch. The first three sound like the ingredients to grape juice. But then you add....vinegar? As if the ingredients didn't weird me out enough, the tag line on the packaging is really interesting: "They quench your thirst and their acid content makes them a natural mouth freshener". I assume the 'they' in this content is the drink, or did we just walk into the middle of some weird anime?

At first I couldn't smell the vinegar, only the grape juice. Then a waft of strong vinegar hit me. This is the same thing that happened when I drank it. The first sip there was no vinegar taste. So for my second sip, I took a bigger one and got a strong vinegar taste. I really like the taste of vinegar, so i can't say this is bad. But it's not really that good. You only get slight hints of vinegar when you're drinking it, it's mostly grape flavored. But then when it settles in your stomach, it's all vinegar. I don't really understand the appeal of this drink. Maybe it's for people who like vinegar, but it looks weird chugging a bottle?