If you know of the Panera chain of soup & sandwich shops then you might know about their latest marketing campaign — they sell clean food.
I guess that means that other menus — those of their competitors in the fast food industry, that is — are populated by, well, dirty food.
Apart from the curiously anti-intellectual theme to the campaign (if you can’t easily say the name then it must be bad for you), the initiative makes evident that Mary Douglas‘s work is as relevant now as it ever was.