We’ve all walked into a bathroom only to be greeted by unpleasant aromas.
Instructables user kenyer built a bathroom timer that can warn poor, unknowing souls before they enter.
Using a basic kitchen timer and a few plastic containers, kenyer constructed the threat level indicator.
The further you turn dial, the higher the threat level.
Check the link below for the complete guide.
Biohazard toilet warning| Instructables
Photo bykenyer.
