Describe something you can`t live without(文字版）

It must be the black coffee in life. Maybe not a lot of people love it, but I am big fan. I would have a cup of black coffee in the morning each day, sometimes, in the afternoon or sometimes when I feel a bit tired, I would grab some coffee you know. I think it is a good thing to me, after having it, I would be fun of energy everyday. At the same time, it is not very expensive, 10 Yuan or such, I could afford it. It is a great helper of my life, too. You know, when I am very lazy or my working or study efficiency is very low, I would have a cup of coffee. Then everything would be back. Several days ago, when I had to deal with lots of work, 10 cups of black coffee from morning to evening, you know, they were with me. Thanks to those coffee, I could stay energetic all day. Now, I start to learn how to make it by myself, in the past, I bought it from Starbucks or coffee shops, now I would do it by myself. That is it.