Three Teens, a Handful of Tamarind Seeds,
and a Big Idea That's Changing How the World Drinks Water
Vivaan, Ariana, and Avyana were 16 and fed up. So they built Plas-Stick — and the world's largest youth environment prize agreed it was brilliant.
Somewhere in a rural village in India, a young child cups their hands and drinks water from a shared container. It looks clean. It probably tastes fine. But invisible to the naked eye, thousands of microplastic particles are floating in that water — fragments of bags, bottles, and synthetic fabrics that have broken down into dust-sized specks and quietly found their way into the food chain, the bloodstream, and now, the brains of people across the world.
Most of us have read the headlines and shrugged. Three teenagers from India decided to do something about it instead.
Vivaan Chhawchharia, Ariana Agarwal, and Avyana Mehta — all 16 years old — have just been named Asia Winners of The Earth Prize 2026, the world's largest environmental competition for teenagers, for their invention: Plas-Stick. It is a biodegradable powder made from discarded tamarind seeds that, when added to stored water, clumps invisible microplastics together so they can be fished out with nothing more than a handheld magnet. No electricity. No expensive machinery. Just a crop that has been sitting in South Asian kitchens for centuries.
The Moment That Made It Personal
It did not start in a lab. It started with a field visit during an environmental science course — the kind of trip that is supposed to be educational and mostly forgettable. But when the team arrived at a rural community and watched a child drink directly from a shared water container, something shifted.
"Seeing a child drink from one of these containers made the issue feel immediate and personal. We realized that microplastic exposure through everyday drinking water is a hidden challenge affecting millions."
— Vivaan Chhawchharia, Ariana Agarwal & Avyana Mehta, Inventors of Plas-StickThat is the thing about microplastics: they have been found in human blood, lungs, livers, and placentas. Scientists are still mapping the full extent of the damage, but what is already known is not reassuring — these particles act as endocrine disruptors, interfering with the hormonal systems that regulate nearly every function in the body. For communities that rely on stored, shared water containers rather than treated tap water, the exposure is constant and largely invisible.
Why Plas-Stick targets the most vulnerable populations first.
Four steps. No electricity. No complex infrastructure. Just chemistry and a magnet.
Measured Plas-Stick powder — derived from waste tamarind seeds — is added to the water container.
Stirring distributes the powder, triggering natural binding with invisible floating microplastics.
Microplastic particles cluster into visible masses, rising to an accessible surface layer.
A handheld magnet lifts the clump out cleanly. No replacement parts. Zero waste. Reusable.
The team worked with researchers at IIT Guwahati to refine and validate the process. That collaboration is significant — it means Plas-Stick is not a school project, it is a peer-reviewed concept backed by real materials science. The powder is biodegradable, the process leaves no secondary contamination, and the magnet is reusable. The entire system has been designed for communities where complex filtration infrastructure is economically out of reach.
Why This Matters Beyond the Headlines
Environmental competitions produce lots of winners. Very few of them survive contact with reality. What makes Plas-Stick different is the specificity of its design context. The trio did not try to solve microplastics for everyone, everywhere. They focused on shared water containers in rural communities — a defined problem with a defined population — and optimised every design choice around that constraint.
The three students begin studying water quality during their coursework and start noticing the gap between global awareness of microplastics and accessible solutions for rural communities.
A visit to a rural village where they witness a child drinking from a shared storage container becomes the turning point. The team commits to building a solution that requires zero infrastructure or electricity.
The team partners with researchers at IIT Guwahati to test and validate the tamarind-based binding mechanism, turning a school hypothesis into a scientifically verified process.
Plas-Stick is deployed in workshops reaching over 8,000 students and teachers, proving the concept at scale while building public awareness about microplastic contamination.
Vivaan, Ariana, and Avyana are named Asia Winners of The Earth Prize 2026 in Geneva, taking home $12,500 each to scale Plas-Stick across rural India and beyond.
"Age is no barrier to meaningful change. These students saw a problem, took it seriously, and built a solution that actually works for the people who need it most."
— Peter McGarry, Founder, The Earth FoundationThe Bigger Picture
There is a tendency to treat stories like this as inspiration content — heartwarming news that momentarily distracts from the scale of the environmental crisis before business returns to usual. That would be a mistake here. Plas-Stick is not a metaphor. It is a working technology, validated in collaboration with a leading research institution, already deployed in educational settings, and designed with genuine scalability in mind.
Maybe the most remarkable part of the story is this: three 16-year-olds found an answer to a problem that the water treatment industry, with all its resources and decades of effort, had largely left unsolved for the world's most vulnerable communities. They found it in the kitchen larder, processed it in a lab, and are now handing it to rural villages across India, one workshop at a time.
Vivaan, Ariana, Avyana — the world is watching, and it likes what it sees.
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