If you've ever ordered a McFlurry from McDonald's, the chances are you'll have been left disappointed when trying to suck up the last of your ice cream - only to discover the hollow end of the spoon is not actually a straw.
For years fast-food lovers have been convinced the plastic spoons were actually a design defect, because if you can't use them as a straw then why on Earth are they made that shape?
Well, it turns out there's actually a perfectly logical explanation for it, and it has nothing to do with straws at all.
