Ans: If you order a latte or cappuccino with foam on top, you will be grateful for both the look and the extra texture. The waiter who made the drink used a steam wand to make bubbles and complete the drink. But if you apply the same foam to the ice version of the drink, it will not work.
While the traditional foam for hot coffee drinks is made with evaporated milk, cold foam for iced drinks is made with air and stirring to whip the milk and keep it cold. The cold foam is close to the temperature of the ice drink, so it retains its texture and volume for longer.