Popov is a brand of vodka

Vodka

Vodka , is a distilled beverage. It is composed primarily of water and ethanol with traces of impurities and flavorings. Vodka is made by the distillation of fermented substances such as grains, potatoes, or sometimes fruits....

 produced by British drinks giant Diageo plc's Diageo North America subsidiary. It commands a significant marketshare among vodkas in the United States and competes in the low-mid range pricing niche, and because of this it is also affectionately (and ironically) known as "Russia's Finest" among college students.