An interpretation of the City of Chicago Flag at a hotdog place.
Just like the actual City of Chicago Flag, the symbols on this one clearly represent the real Chicago Hotdog:
- The three white stripes must represent the base layer of the hotdog: the Poppyseed Bun, the All-Beef Hotdog and the Mustard
- The two blue stripes clearly represent the two special ingredients: the neon green pickle relish and the celery salt
- The red stars - uh, I mean hotdogs - seem to represent the remaining components of the official hotdog: Chopped Raw Onion, Sport Peppers, Tomato Wedges, and a Dill Pickle

The Chicago History Museum has a good description of what the symbols on the actual Chicago Flag mean. You can click here for the link.