There are people working in a drink food stand filling cups, shaking cups, holding cups or just walking around.  A young man fills a clear cup with liquid, puts it on the counter, covers it with a paper cup, shakes it vigorously, and when he's done he puts the paper cup down and pours all the contents into it, puts a yellow straw into it and hands it to the person waiting. Next to him another boy was also shaking a cup, and then preparing to transfer the contents to a paper cup.