My wife now knows not to insist on pure cranberry juice, but rather to request a 100% juice blend and not “cocktail” (the cocktail is what the juice blend goes in). I finished the battery acid myself over the course of a few weeks, out of pure Floridaman cussedness. It was not pleasant.
You just mix this with water to get what you want. It’s much cheaper than the sugary cocktail crap that’s mostly apple juice anyway.
If it’s not sweet enough, you can add sugar.