Looks like they are selling, Orange Juice. Thinkin Orange Julius.
http://www.orangejulius.com/index.php
That was my first thought looking at it. Squeeze Inn, And what looks like orange juice splashing the car gave me No indication it was a tasty burger at all.
"Best Burgers In Town" kinda looks out of place for whats being presented.
Never heard of the place before being in Chicago.
How iconic is this place in it's area?
Does the name Squeeze Inn scream tasty chesse burgers to the Locals who see it?
If I was on vacation and hungry and saw it, i'd still be looking for a place to eat.
Do you have a cheese burger on the back maybe?