Coffee Flote (Float).

Ingredients:

400 ml chilled water (1 5/8 cups or 13 1/3-ounces) 
3 tablespoons sugar 
Juice of 1/2 lemon (1 tablespoon) 
1 teaspoon instant coffee powder 
1/4 teaspoon salt 
1 1/2 teaspoons Eno fruit salt* 

Direction:

1. Mix everything, except Eno fruit salt, and pour into two tall glasses. 
Add two ice cubes per glass. 
Just before serving add 3/4 teaspoon Eno fruit salt into each glass. Stir lightly until frothy. Serve at once. 

Makes 2 servings.

*Available in most heath food stores. Usually contains citric acid and/or tartaric acid, sodium bicarbonate and (di)sodium carbonate.