Frozen fruit-juice concentrate provides a convenient base for these cool and fruity cocktails.
Place sugar in a shallow dish. Rub lime wedge around the rims of seven margarita glasses or other 8-ounce glasses. Invert glasses into sugar. Shake off any excess and set glasses aside.
In a blender combine tequila, juice blend concentrate, raspberry liqueur, Triple Sec, and lime juice. Cover and blend.
With the blender running, gradually add ice cubes, 1 cup at a time, through opening in lid; blend until slushy.
Pour blended mixture into prepared glasses. If desired, garnish with fresh raspberries and lime peel twists.