Right on time before the tour stop in Duisburg the shirts are available in Essen and Duisburg.
Everybody who buys a shirt at one of these shops will get free entrance at YUM YUM on Aug 15th plus the shirt comes with a free mixtape. So grab one while you can at
Die Basis – Kopstadtplatz 5 – 45127 Essen (Homepage | Google Maps)
or you go to
Mad Flava Street Store – Tonhallenstraße 19 – 47051 Duisburg (Homepage | Google Maps).