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They’ve taken a step beyond business and embraced sustainability through oil waste collection. Sunilens has set up a simple yet powerful system: people can bring their used cooking oil—the kind left over after frying—and drop it off in special containers. From there, the company takes care of the rest.

That used cooking oil doesn’t simply get thrown away or poured down the drain. Instead, it’s collected and recycled into biodiesel—a renewable, cleaner energy source that powers vehicles and machinery, helping to reduce our reliance on fossil fuels.

This small but powerful change brings wide-reaching benefits for both people and the planet. By reducing pollution that would otherwise contaminate our water sources, soil, and drainage systems, it protects the environment from long-term toxic damage. It transforms waste into clean, usable energy, giving new life to a byproduct that would otherwise be discarded. In doing so, it supports a circular economy, where valuable resources are not wasted but continuously repurposed in sustainable cycles. This shift also promotes energy independence by decreasing reliance on imported fossil fuels and strengthening local energy security. Most importantly, it protects public health and ecosystems by preventing the harmful effects of improper cooking oil disposal—proving that even the smallest actions can lead to meaningful, lasting impact.

By simply choosing to collect and recycle used cooking oil, communities can make a significant impact—transforming everyday waste into a vital resource for a greener future. Instead of going down the sink or into the trash, used cooking oil becomes part of the solution. And Andrej and the Sunilens team are making that transformation possible—one bottle at a time.

The story of Andrej and Sunilens fits perfectly into the bigger picture of Green is Easy, a small-scale project connecting partners from North Macedonia, Greece, and Spain. While each partner brings different experience to the table, they’re united by a common goal: to show that green living isn’t complicated.

“Green is Easy” is a small-scale partnership between Greece, Spain, and North Macedonia with varying levels of expertise in the field of KA2. This project aims to fight against climate change and raise awareness on environmental sustainability in regards to changing the view that green practices are not difficult. It is co-funded by the European Union.