Its a key fob/ keychain, which has its oroigin as a birthday gift to my sister, who is a big fan of the german sitcom.
I hav produced this as stainless steel and goldplated- looks great. Stainless steel assures that the key fob will hold forever. The name of the street is engraved on both sides. Currently I do not foresee plastic as printable material, as it is expected that it will break during daily use.