34. Portable Toilet Sound Blocker
What is it? A device that masks embarrassing toilet sounds
Invented: 2011
Average price: 35*
Some Japanese women find it embarrassing to use the bathroom when there are other people at home. It was not uncommon for women to flush the toilet or turn on the faucet to hide less-than-graceful toilet sounds. But Keitai Otohime came up with a toilet sound blocker.

It is a small, battery-operated speaker that plays sounds of running or flushing water to reduce water waste. The product is available in pink and has a ribbon design or forest. It’s battery-operated.