en.Wedoany.com Reported - A resident of Araguaína, in northern Tocantins state, Brazil, used PET bottles as a substitute for traditional bricks to build a house, reducing construction costs to approximately 13,700 reais, nearly 45% lower than the local cost of 25,000 to 30,000 reais for similar homes.

The project was initiated by resident Arlete Maria de Sousa, using approximately 2,700 beverage bottles as wall filling material. The bottles were collected through donations from friends and family, and construction was assisted by relatives, with her father, João Evangelista, participating as a mason. According to local media UOL and G1 Tocantins, the building took about 30 days to complete, requiring significant labor and organization during the construction process.

Using PET bottles in building walls reduced the amount of bricks needed, repurposing packaging waste that would otherwise have ended up in landfills or conventional recycling channels. Civil engineer Adriano Luz, in an interview with G1 Tocantins, stated that a visual assessment suggests the house appears safe, but such an evaluation cannot replace a complete structural analysis report. The engineer described the approach as an "innovative and sustainable house."

Arlete expressed satisfaction with the interior space of the house. She plans to continue expanding and has already started collecting new bottles for future projects. This case demonstrates a personal practice of using recyclable materials in construction, showcasing how low-cost solutions can originate from everyday waste, though such practices still rely on planning, technical knowledge, and professional evaluation to ensure safety, durability, and comfort.

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