It's free. Put the right amount of coffee powder into the coffee machine and add the right amount of water. Use a coffee machine to make coffee. Pour the brewed coffee and milk into the coffee cup. Foam the milk with a bubbler. Pour the foamed milk into the coffee cup. Then sprinkle a proper amount of cocoa powder on the surface of the milk foam. The coffee in KFC is made by machine, so it tastes the same. It tastes delicious quickly, but it has an obvious disadvantage, that is, it has no special taste. In any case, some functions of human beings cannot be completely replaced by machines. Starbucks coffee is different, and it is basically artificially ground. In the process of making, the intention of the producer is incorporated, so it will give people a completely different feeling when drinking.