At first glance, the small bright-red oval sitting in your hand could easily be mistaken for an old makeup case, an earbud holder, or even a vintage fidget toy. Its smooth rubber body has no obvious zipper, button, snap, or clasp, leaving one simple question: how did it open? For decades, this little object was a familiar sight in purses, pockets, glove compartments, and desk drawers across North America and Europe. From the 1950s through the 1980s, people relied on coins for everything from public telephones and bus fares to parking meters, vending machines, and laundromats. What looked almost too simple to be useful was actually designed around an ingenious little trick.
The secret was a narrow slit running through the center of the flexible rubber or vinyl body. Squeezing both ends caused the sides to bow outward, widening the opening enough to grab coins or other small items. The moment the pressure was released, the material returned to its original shape and the slit closed again, effectively sealing itself without any complicated mechanism. Businesses quickly realized the value of the design, too, and banks, gas stations, insurance companies, hardware stores, and other local businesses often handed them out as inexpensive promotional gifts featuring names, logos, addresses, and phone numbers. But there was another reason these humble little purses became so memorable—and it had nothing to do with advertising.
