2 cups lemon or lime soda
2 tablespoons sugar
Juice of 1/2 lime
Pour soda into ice cube tray or shallow pan, freeze.
Place frozen soda in blender, add lime juice and sugar.
Blend until well-mixed.
Rub lime around rim of glass and then dip glass into salt.
Pour mixture over crushed ice and then into salted rim glasses.
Garnish with lime slice.