Four Harvard students Bates, Denise, Dennis and Sacha had someone take a picture of them with all of them holding a specific drink in their hands. All four of them were also wearing the same type of shirt which had nothing but a large star figure printed on it. Before the picture of them was taken they made sure that the four of them arranged themselves in a line so that Denise was placed to the far left and the rest in some ordered way. This way the picture made perfect sense to them.
How did they line up and what drink did they all hold in their hands? Explain your reasoning.
Hint:
The star on their shirts is a description of something geography related.