The McDonald’s French Fry Box Flap Has A Purpose? Did y’all know the flap on your fries box actually has a purpose? pic.twitter.com/abptKfFxSB — Today Years Old (@todayyearsoldig) January 5, 2019 So is the flap on the fry box made for ketchup? Yes No 0 votes · 0 answers Vote SHARE RELATED CONTENT Congratulations To The ACM Award Winners!! The Big 94.5 Most Wanted Vote For Who You Think Should Win At The ACM Awards! A Special Performance By Maren Morris!! Coming Soon A Special Performance By Maren Morris!! Cassadee Pope Performs Live!!