Overview
A cosmopolitan, or, informally, a cosmo, is a cocktail made with vodka, Cointreau, cranberry juice, and freshly squeezed or sweetened lime juice.
History
The International Bartenders Association recipe is based on vodka citron, lemon-flavored vodka. The cosmopolitan is a relative of cranberry coolers like the Cape Codder. Though often presented far differently, the cosmopolitan also bears a likeness in composition to the kamikaze cocktail.
The origin of the cosmopolitan is disputed.
From Wikipedia (CC BY-SA 4.0).