Hungarian Alberto Vásquez was inspired by the lack of water faced by communities in Colombia; The project has already won two international awards and is now seeking investors.
Amid the water crisis, one of the main recommendations is to reuse water to reduce daily consumption.
But doing so is not exactly easy or practical, at least when it comes to one of the most water-demanding daily habits: bathing.
Today we need to use basins or buckets to prevent a large volume from going down the drain - and yet much of this water is lost.
Gris System uses interconnected reservoirs to capture bath water for reuse
But Hungarian designer Alberto Vasquez has created a simple technique that allows up to 90% of the bath water to be reused.
"Gris is the result of a two year work I did during my college," Vasquez tells BBC Brasil.
"It's a simple idea, but one that required complex research."
Platform is non-slip to prevent accidents while showering
Modules are tilted to the center where water is collected
Once full, reservoirs can be disconnected.
Invention allows to store up to 40 liters at a time
The Gris consists of a non-slip platform formed by four interconnected reservoirs that tilt slightly to the center, where inlets allow water to accumulate inside.
Each reservoir holds up to ten liters, the same as a common bucket. When they are full, you can disconnect them and use stored water for other purposes, such as flushing or cleaning the house.
According to Sabesp, the company responsible for supply in São Paulo, a five-minute shower - the recommended duration for not wasting water - wastes 45 liters.
Thus, the use of the Gris system would allow to reuse almost all the water used in the bath.
System can be easily assembled by the user.
Alberto Vasquez won two international design awards with his invention
Vasquez was inspired by the constant lack of water faced by communities in Colombia, where his mother was born and where the designer spent part of his childhood.
Since introducing Gris last year, the designer has won two of the international awards, the iF Design Award and the A'Design Award, and has been awarded by the Hungarian government.
"I get 40 to 50 emails a day from people who want to buy it because they face water problems in their countries," says Vasquez.
But for now, the designer has only one prototype. He expects to market it for a price between $ 20 and $ 40.
"I am looking for partners to produce it on a large scale so that I can start selling it."