Of course not. Kvass is a drink made from fermented bread. The most authentic Kvass is Qiulin Kvass, an old brand with a history of hundreds of years. Wahaha Kvass is a new one, blended with wort. Yes, it is not authentic at all. Qiulin kvass is better. When buying Qiulin kvass in Harbin, you have to mention it.