Traffic Cone

Our local McDonald's is offering a special where, if I buy a meal, I get a free ice cream cone. Now, maybe that works if you eat inside. Maybe they let you go back to the counter and get your free cone after you eat your burger and fries. But what about the drive-through? Aren’t most of their customers drive-through people? Can you really get the cone handed to you when you get the burger? You’d have to eat the cone first, during which time your fries would go limp. I suppose you could get your meal, hop back in line, and eat your meal while you’re in line. Or maybe you could get just your meal and drive around and eat your meal and then go back for your free cone. What would be the time limit for you to come back through the line? What if there’s a shift change and they don’t remember you when you come back through the line? And there would always be one that guy who would try to come back like 3 hours later, maybe in a different car…

Is this concept even safe? If they made eating ice cream and a burger and fries at the same time while driving illegal, and you got pulled over for it, and you pounded down the ice cream, burger and fries while the cop was walking up to your car, would it be legal for them to give you a breathalyzer?