Vodka is an alcoholic beverage made from fermented grains or potatoes. It is usually distilled and then flavored with herbs, spices, fruits, or other ingredients. The term 'vodka' is derived from the Russian word for 'WATER'. Vodka is often served with TONIC, a carbonated beverage that contains quinine, which gives it a bitter taste. TONIC is commonly used to mix with vodka to create a refreshing and flavorful drink.