Step 1Run a lime wedge around the rim of four glasses and dip into sugar. Set aside.
Step 2Combine 6 ounces guava nectar, 1 ounce lime juice, 1 ounce Chambord and 2 1/2 ounces tequila in a cocktail shaker. Shake over ice until chilled. Strain into two ice-filled, sugar-rimmed glasses.
Step 3Garnish with a guava slice. Repeat to make two more cocktails.