A Sink in the Top of your Toilet
Online Sound Effects Library
Cordless Glue Application Tool
Lightweight Head-and-Neck Protection
USB-powered Universal Charging Cable
Tire Inflation Kits for Bicycles and Motorcycles
Self-Dissolving Pouches of Laundry Detergent
Bypass Oil Filter for Trucks and SUVs
Underwater Music for Swimmers
Since contributor Ryan Lewandowski apparently hasn’t used the following item personally, I can’t include it as a regular Cool Tool, …
Custom-printed graph paper