There are hundreds of different brands of Vodka and different types. Vodka may be distilled from any starch- or sugar-rich plant matter; most vodka is produced from grains such as sorghum, corn, rye or wheat. Among grain vodkas, rye and wheat vodkas are generally considered superior. Some vodkas are made from potatoes, molasses, soybeans, grapes, rice, sugar beets and sometimes even byproducts of oil refining or wood pulp processing. In some Central European countries, such as Poland, some vodka is produced by just fermenting a solution of crystal sugar and yeast.