I use to fill a bottle with "clean" water and put it aside.
Then I would take anything Iying around the bathroom (shampoo, mouthwash, etc) and mix up a potion in the toilet and flush). I would drink my water all day long so that I wouldn't mutate along with the rest of my block.
A childhood belief about bathrooms

others believed things like this
- My mum used to tell me that you couldn't drink water out of the tap from the bathroom as it was poisonous.Anon
- that bathroom tap water was recycled "potty" water from the toliet. — livingdeadgirl
- I thought tonic water was toxic water and wondered why would anyone drink it if it is toxic?— Dr.Badguy
- When I was young I refused to drink well water because I thought it came out of whales.— itodd
- I used to think that if I ate a fruit seed it would grow in my stomach if I drink water after thatAnon
- if you drink water from unsafe places, frogs will grow in your stomach...— Olivier