Why is the McDonald’s McFlurry spoon is square and hollow?

We finally know why the spoons of the McFlurry are hollow and square. We can finally move on, after this question had troubled us for ages. Don’t deny. So the mystery was finally cracked? It’s all thanks to this McDonald’s ex-employee who shared the explanation on Tumblr.

as someone who worked at mcdonald’s i can tell you that:

we fill the cup with ice cream, we dump the oreos on top, we stick the spoon in, we put the entire thing in a machine and use the spoon to stir your mcflurry