Jay Livingston of MontClair SocioBlog, in the tradition of Dan Myer‘s takedowns of TIDE and Aquafresh, tells the tale of his aspirin purchase:

It came in two sizes – 120 pills and 300 pills. The larger size was the better bargain. And it certainly looked much larger on the shelf.

Then I got home and opened the package. The bottle was mostly empty. I had bought a lot of air. The 300 little aspirin tablets were all there I guess, though I didn’t bother to count them. But they would have fit into a bottle one-third the size.

For more marketing tricks, see our post on the meaningless discount and the geography of the menu.

Lisa Wade, PhD is an Associate Professor at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming introductory text: Terrible Magnificent Sociology. You can follow her on Twitter and Instagram.