Question: What is the name of this traditional Slavic and Baltic fermented beverage that is used for a flavor in Fruktime and commonly made from rye bread whose colour contributes to the resulting colour of the drink?
Sentence (from "Fruktime"): Fruktime - a series of the carbonated soft drinks which are on sale in Russia and Ukraine, distribtuted by The Coca-Cola Company.
Relevant evidence: No