Kvass barely counts as alcoholic by Russian legal standards — under 1.2%, the same threshold that classifies it as a non-alcoholic beverage — and across the Soviet era, tank trucks selling it from a single shared metal mug were a common summer sight reaching all the way into Kazakhstan.
Rye bread is fermented into a lightly fizzy, faintly sour, barely alcoholic drink, sold ice-cold from tanker trucks and roadside barrels through the summer months. Petropavlovsk and other northern Kazakh cities near the Russian border keep the tradition alive with vendors setting up curbside taps as soon as the weather turns hot.