Wild Yet Genius: Japan’s Most Unusual Inventions

12. Japanese Scream Jar

What it is: A jar that muffles shouted stress Invented: 2016 Average Price: $81.72

The Banraishop Scream Jar hushes a full-volume yell to a whisper, granting instant catharsis without alarming neighbors.

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Scream Jar in Japanese @John P. Pinterest/MMcCartney

It doubles as a quiet tool for vocal practice.