24 oz. freshly squeezed mandarin juice, cold (from about 10 lbs. mandarins)

12 ounces lemon-, lime-, or grapefruit-flavored sparkling water (unsweetened)

1 pint high-quality vanilla ice cream

4 ounces Cointreau or Grand Marnier (optional)

Divide the mandarin juice evenly among 4 highball glasses.  Pour 3 ounces of the sparkling water into each glass. Top each float with 2 generous scoops of vanilla ice cream, and top with a float of the Cointreau or Grand Marnier, if using. Serve immediately. Makes 4 highball glasses.