11. Bath Cushion or Phone Strap
What it is: A bath cushion with a waterproof phone case
Invented: 2015
Average Price: $37
The Bath Air Pillow Smartphone Holder by Thanko allows you to use your phone in the bath without risking water damage. It doubles as a comfortable backrest.
Shower Cushion/Mobile Phone Stand @RandomGoodStuff/TTwitter.com
Available in gray, pink, or white, this waterproof pillow makes bath time more enjoyable and convenient.