No one who has red wine + white vinegar always on-hand should ever be buying commercially-prepared red wine vinegar. Using this 2-ingredient 1:3 ratio mixture w/a 1 min prep is ideal for recipes requiring red wine vinegar & can easily be doubled or tripled to get a larger volume than 1/4 cup as desired. It can also be infused w/garlic or other herbs as desired. I use this a lot & just today discovered to my surprise that this easy-fix copycat was not in the Zaar data base. *Enjoy* !