In a blender,puree the cucumber,mint and sugar,water.pour the puree through a fine mesh strainer in to a bowl.use the spoon to press the solids to take out all the juice.

There will be about 1-1/4 cups of cucumber juice.
Add the ice cubes,cumin powder,black salt mix it well.fill the glasses with ice cubes and pour the cucumber drink.

Garnish with cucumber slices and mint leaves.Cucumber cooler is ready to be served.