My favorite drink

My favorite drink is coffee. I usually drink a cup of coffee while I'm studying. Coffee contains caffeine, so I drink a cup of coffee to keep my eyes open. I like black coffee in particular, so I don't put sugar in my coffee. Black coffee is very useful for me to study, but sometimes it prevents me from going to bed, so I feel unwell from lack of sleep. I like Starbucks coffee very much, but it is very expensive for me. I have to pay about 500 yen to drink a cup of coffee at Starbucks coffee. I think their coffees are expensive for students, but I admit thier coffee's price, because their coffee is good. I recommend you to drink Starbucks's coffee. I am sure that their coffee will be your favorite coffee. ( 140 words )