I don't know what it is. I even talked to the manager. But this McD's is by far the worst. Their buns are always hard, dry and cold. Service is slow. Drive-thru personnel never smile or say thank you and 80% of the time they get your order wrong. So check before driving off. We drive to Blue Diamind location when we want McD's! Theirs is hot and buns are fresh and better fries. Worth the drive. Also, Teenagers always loitering around. Dirty. Wish a decent hamburger joint would come to So Highlands!!!!!