If you could un-invent something, what would it be?
I would un-invent water bottles. It’s a multi-billion-dollar business. However, drinking water from water bottles can be dangerous because plastic can contain chemicals and microplastics that are harmful to our health.
These plastics are so tiny they can migrate through the tissues of the digestive system or lungs into the bloodstream, distributing potentially harmful synthetic chemicals throughout the body and into cells.
One liter of water contains an average of 240,000 plastic particles from seven different types of plastics.
Bottled water is a convenience that Americans have, but if we have a different choice we should take it. 
From Pity to Praise 