SPOON 3 tablespoons of the mango liquid into a saucer; PLACE sugar into a second saucer; DIP rims of glasses into mango liquid and then sugar; SET aside.

POUR mangoes and remaining liquid into electric blender; ADD limeade concentrate, tequila, Triple Sec, and Grand Marnier; PROCESS until smooth, stopping once to scrape down sides.

POUR half of mixture into a small pitcher; SET aside

ADD ice to remaining mixture in blender to bring it up to 5-cup level; PROCESS until slushy, stopping to scrape down sides.

POUR unto prepared glasses

REPEAT steps 4 & 5 with mixture set aside in pitcher.