I drink at least three cups of coffee a day. Drink hot in winter and ice in summer. The cold-soaking method of instant coffee is actually very simple and not as difficult as expected. First, pour the instant coffee into the coffee cup, then add a little hot water, stir it, and then add a proper amount of cold water according to your taste, or add a certain amount of ice cubes, or both cold water and ice cubes. The reason for brewing with hot water is that instant coffee melts more easily in hot water. Of course, it doesn't matter if you don't want to use hot water. You can stir it for a while.