Sbiten (russian: сбитень) or vzvar (взвар) is a traditional east slavic (russian, belarusian, ukrainian) hot winter beverage. it has a dark purple appearance and, depending on the recipe, can be very spicy and/or very sweet. it used to have the reputation of a russian glühwein, although it normally contains no alcohol. modern sbiten can also be served cold during the summer or added to tea or coffee.

Source: Wikipedia