tts bcoz da fries are totally dehydrated after deep fried~~~ so no water can support da fungi from growing loh~~ (i dont tink macdonald will offer so much preservative haha)
i love da fishy burger after 10 weeks, its lyk coated with a layer a nice tasty sweet sugar or cream~~~ hmhm, yam yam~~~
so, conclusion~~~
The longer you keep your food, the tastier it will be!