You make Frappe easily, the steps are:
1) Put a couple of centimeters (about 30ml) of water in a shaker (image 1) Dont put too much water because the foam will not be enough,
2) Add 1 to 1.5 small (about 4grams) spoons of Nescafe Classic instant coffee, sugar of your preference (1 small spoon is considered normal, 2 is considered sweet) (image 2),
3) shake it well until it ALL becomes a homogeneous foam (image 2) the foam can be up to half the glass, it depends on the amount of water and coffee you add. Note that the best way to shake it is using a frappe mixer (there are portable battery operated mixers as well as electric ones but the battery operated are not very strong)
4) poor it in a water glass, add a couple of ice cubes, and fill the rest with water until the foam reaches the top of the glass (image 3). You also need a straw. You may also add some milk if you prefer. You can drink this slowly it may even last for hours...