Wild Yet Genius: Japan’s Most Unusual Inventions

6. Eating Burgers and Napkin Shield

What it is: A napkin that hides your mouth while you eat Invented: 2013 Average Cost: Free with a Classic Burger

Freshness Burger’s Liberation Napkin lets diners enjoy big bites while respecting the social custom of covering the mouth.

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A Burger Eating Napkin Shield via Facebook (@Heidi Autio)

The discreet paper veil drove a 213 percent jump in female burger sales.