Where can I find Drainage tea in Inden?

Drainage tea can also be found in these cities:

Aachen Aken Alsdorf Baesweiler Bedburg Bergheim Düren Eschweiler Geilenkirchen Herzogenrath Jülich Kreuzau Langerwehe Niederzier Nörvenich Stolberg Titz Vettweiß Würselen Übach-Palenberg

You can also find this in Inden:

Pudding Decorative Sugar Three-Grain Bread Cereals Delicatessen Sausage Spice Pastes Mashed Potatoes Raisin Roll Canned Sausage