Circular business models are essential in tackling plastic waste, shifting the focus from single-use consumption to reusable systems that drive both economic and environmental benefits. But what does that look like in action? Enter the Aarhus case: a large-scale reuse initiative involving the city of Aarhus, TOMRA, Plastic Change, and BCG. Together, they have developed a system to collect, clean, and redistribute reusable cups—one of the biggest pilots of its kind globally.