I've never found a canned/bottled kvass at a "pan-East-European" grocery that was better than "just OK." Usually too sweet, too malty, and too syrupy. Sometimes

I've never found a canned/bottled kvass at a "pan-East-European" grocery that was better than "just OK." Usually too sweet, too malty, and too syrupy. Sometimes you see on the cans drying drips of molasses (or motor oil or whatever) that it's sweetened with. I'd kill for a Soviet street-vendor style kvass: dry, golden-yellow, fizzy, and tasting of burnt toast.