(Source: Our Dancing Daughters; Metro-Goldwyn-Mayer)
Shoe Compacts For Flappers
Seeing how makeup was only worn by promiscuous women in the 1800s, putting on makeup in public was still seen as very taboo a few decades later. Sure, people knew women powdered their noses now, but they didn't want that fact thrown in their faces.

Knowing that, flappers loved to put on their makeup in public. But since their fast dancing made it hard to carry a purse, shoes with special compact-holding buckles were invented.