Check out this Fish Bowl Sink developed by Yan Lu:
“Well here’s a clever way to encourage people to conserve water while they’re washing their hands. As you use the Poor Little Fish Sink, designed by Yan Lu, the water in the fishbowl slowly drains away. So if you use too much the goldfish will meet an untimely demise. According to Yan the “Poor Little Fish basin offers an emotional way to persuade consumers to think about saving water, by making consumption tangible” though I’m sure there are still a lot of people who would value clean hands over the life of a small fish.”
Do you think such a mechanism would help create awareness?
It would definitely work better than using negative reinforcement as seen here: Elevator Use, Public Shame, and the Public Good.