Salt the rim of the glass (optional): Rub a lime wedge around the rim of a rocks glass. Fill a small plate with coarse salt. Dip the glass into the salt to coat the rim. Fill with ice.

Place the cranberry juice, tequila, orange liqueur, and lime juice in a cocktail shaker with ice. Shake and strain into the glass. Garnish with cranberries and rosemary and serve.