Unidetified Liquid

So construction guys have been working on the roof outside my window, and they left their drinks right outside my window. There's an empty Minute Maid orange juice bottle, two Mountain Dew cans, and an unidentified liquid in a KFC paper cup. I want to know what's in it! It's going to drive me mad! What did that construction worker drink?! ARGH! I'm just kidding. Actually, I'm not. I'm sort of intrigued. I wonder if he'll get KFC tomorrow. I'll stake out in my room and try to catch a glimpse of the liquid's color that rises in the straw. Then I'll search KFC's offered soda fountain drinks. Huzzah! The game is afoot! Have at you!