 1 in 3 human globally do not have access to safe drinking water. This is one of the leading causes of death in the world. Yet there are excellent solutions to make water drinkable. This ceramic water filter is eco-friendly and can be manufactured anywhere in the world at low cost. We went to Guatemala to visit Eco-Filter, a great social enterprise that manufactured them and teaches entrepreneurs how to set up their own factories. At Lotec Lab, we travel the world to find the best Lotec. Inventions that are useful, sustainable and accessible to all. My name is Fili Wilson, I'm the founder of Eco-Filter here in Antigua, Guatemala. Here is a ceramic filter. Yes, it is a technology that was invented in 1982 by licensed Fernando Masariegos from Panajachel, Guatemala. And it is a technology that replicates, as well as nature purifies water in a thousand meters. This purifies it in a couple of inches or centimeters. And it is made of natural materials that can be found anywhere in the world. How does the water function? Yes, it fills it, it fills it with water and by gravity it is gushing little by little. So one to two liters per hour, it gives you drinking water. In countries like Guatemala, more than 95% of rivers, wells, water sources in general are contaminated with fecal oric bacteria. If you do not have access to drinking water, it kills more people than any form of violence, including wars. So when you bring drinking water to a community, it is the most important intervention for the health of the community and for the production. There is no better intervention than bringing drinking water to a family. What they do here in Guatemala is to boil water. They use four glasses and boil it. But many times it is not boiled properly. So there are many children who have intestinal infections because they do not know how to boil in a way where 100% of the bacteria move. What is the history of this filter? It started as a foundation and my sister was the director. And when it started, there would be a million families without drinking water. But the foundation gave the filters. And it did not have enough resources to give to all families. So it happened to me that this filter could be put in a mud container for urban families or a plastic bucket for rural families. So the urban sale, which is profitable, gives us the possibility to maintain prices very low for rural families. And so we have achieved more than 400,000 rural families and more than 300,000 in urban areas. Do you think it can be reproduced in other parts of the world? In fact, there are 61 factories in 39 countries. The last one is Indonesia. The inventor donated technology to humanity because he said it was very important to patent it. So delegations come here to Guatemala. We give them all the information on how to produce and how to sell successfully in their countries. This is an open technology. So all the people who want to come to know how to make a factory to make these filters, welcome. We are happy to give you all the information. And you can personally write to me pwilsongarrobaecofiltro.com I love this technology. It's a perfect example of low-tech. It's sustainable, accessible and very useful. Although it looks super simple, it's not. Each parameter must be carefully controlled, especially the raw materials. And you need a good kill. This is more for entrepreneurs than for amateurs. I tried several times for myself and failed each time. So if you're interested, think big. Do the eco-filtro training and set up your factory. I will explain the principle to you anyway and you can find all the details in the written tutorial. You will need good quality clay powder, sawdust, some use rice husk or peanut shells finely grinded, clean water, colloidal silver, which is a natural antibacterial agent. The filter is made of a mixture of clay and sawdusts. When it is fired in the kiln, the sawdust turns into charcoal. It creates microparasites. Then it is brushed with colloidal silver. When water goes through the filter, pathogens and suspended materials are trapped in the microparasites. This is why the size of the sawdust particles is an important factor. Colloidal silver is used to enhance the inactivation of bacteria and other germs. Once it has passed through the filter, the water is drinkable. The proportion of sawdust and clay is about 50%. It depends on your materials. You have to do some tests. The mixture must be homogeneous, at 60% of the volume in water. At EcoFiltro, they use a machine to mix and extrude the mixture. They cut a slice and place it in a hydraulic press to press the shape. Then they let it dry for 1 or 2 weeks. The surface is scrapped. Then the filters are placed in the oven at 900 degrees for 9 hours. They fill the filter with water to test them. In 1 hour, you should have about 1 to 2 liters that pass through. Those who don't pass the tests may end up in flower pots. Those who pass the tests are covered with a layer of colloidal silver. Simply wash it every 6 months with a cloth. It is recommended to change it after 2 years. Drinking water is precious and desperately needed by hundreds of millions of people. I hope that technologies like this will spread because the potential is huge. The goal of the Lottec Lab is to find Lottec innovation, document and promote them so that anyone can replicate them. It's open source and collaborative, so feel free to comment. And if you start your factory, share it with us.