Mind-Blowing Japanese Inventions You Won't Believe

12. Japanese Scream Jar

What it is: A soundproof jar for stress relief Invented: 2016 Average Price: $81.72 The Banraishop Scream Jar Voice Silencer allows screaming into it for stress release. The jar dampens sound, permitting only quiet murmurs to escape.

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Scream Jar in Japanese @John P. Pinterest/MMcCartney While mainly used for stress management, it also assists with karaoke practice.