McDonald's: The French Fry Box Flap Has A Hidden Function
On his Twitter account a fast food fan reveals a useful life hack regarding the McDonald's French fry box flap, as there it has a hidden function
So to Summarize:
The top flap is definitely not that large and flexible by accident, and the technique for folding it is really handy. So we should all try to see how well it works on our next visit to McDonald's.