All Ukrainians love this drink, it can save you on hot days. It is kept in barrels and you can find it everywhere in the city in summer.
Kvass is Slavic beverage made from black or regular rye bread. Kvass can be prepared from berries and fruits, you can find even honey kvass.
At any time, you can buy the kvass in supermarkets, but locals prefer to buy it in the summer, when retailers roll barrels out to the streets and sell kvass on tap. You can buy a cup, it is perfect for the hot weather.
3 hryvnias per 200 ml and 20 hryvnias per liter (in supermarkets).