Information collected by MarketWatch showed that the U.S.-based and founded Tito's Handmade Vodka sold over 12 million cases and made over $2.6 billion in sales at retail last year. That's nearly 4 million cases more than its next closest competitor, Smirnoff. Vodka, in general, typically ranks as the largest spirits category by volume, but Tito's takes the cake at local liquor stores and nationwide retailers alike. The brand also made our list of the top 10 best vodkas for a martini, stealing the show by being sweet on the nose and silky down the throat.