Refill stations are the places that save you when your water bottle is empty. Because there you can have them refilled free of charge. In the Donau neighbourhood, for example, you can do this at BioCompany in Sonnenallee, at the QM office in Donaustraße or at the Trödelladen in Weichselstraße. In addition, many other places are also involved. You can find out exactly where they are on the refill map.