“Like every year, we work with about eight hundred volunteers,” says Van der Meulen. “We’ve been building the festival for over a week, and we’ll be busy before May 5. We want to prevent as much waste as possible, which you would otherwise have in cups or drinking bottles.” The organization therefore installs water taps where volunteers can fetch water. If possible in reusable drinking bottles. Van der Meulen: “If we could solve that with, for example, drinking bottles and doppers, that would be very nice.”