the coffee is the most popular for human around 20-29 years old. People who are drinking coffee,can work actively. Moreover, drinking coffee in the morning is more benefit for remembering than in the afternoon. Another advantage is that these people can work all day after drinking a coffee. the coffee consists caffeine that affect the brain to work more efficient. However, if in the workplace has a coffee machine will be more convenient for the staffs that they can drink coffee. So that, they will work more efficient.