Hey guys!
To get started with your careA project. Here are some recommendations and adresses in Berlin for collecting the materials to build it up like in the manual.
For cans:
Cheers Kiez Pizza
Choriner Str. 37
10435 Berlin
01522 475 7694
or
Don Pasquale
For buckets I can recommend
Sahara Imbiss - Sudanesische Spezialitäten
(its a chain buisiness so there are more in diffrent areas)
Have fun and share some more spots!