Kopek for plain soda, 3 for soda with syrup was the longtime standard. Kvas, usually by some kvas-delivery vehicle, sold by a person. That seems to be still going strong:<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Kvass#&#x2F;media&#x2F;File:Kwass_kyjiw.jpg" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Kvass#&#x2F;media&#x2F;File:Kwass_kyjiw....</a>