From In the Land of Cocktails, by Ti Adelaide Martin and Lally Brennan
Fill a Martini glass with ice to chill. Combine the vodka, Cointreau, sour mix, and cranberry juice in a cocktail shaker with ice and shake vigorously. Discard the ice from the glass and strain into the chilled glass. Place the lime wedge on the rim of the glass and serve immediately.
Makes 1 cocktail.