square milk : circle can

99 CentFor those who might dither in the dairy aisle of the grocery store, one hand idly gripping the fridge door, the other tenuously considering the rigid corners of a waxed-cardboard carton of bovine goodness. 'Why is this nutrition delivery device angular,' you might ask, then--turning your attention to the towering pyramid of Pepsi One six-packs to your right, 'while these aluminum soda-pop receptacles are forged into cylinders?'

Ho! here are the long awaited answers... elementary geometry, my dear Watson!

I think I remember this example from an econ book in college.

art: 99 Cent, Andreas Gursky, 1999