There can indeed be quite some money in collecting bottles and cans in countries with a return-for-money collection system.

"Burk-Kurt".

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In Swedish:

http://www.aftonbladet.se/nyheter/article11769212.ab

http://www.expressen.se/nyheter/burksamlaren-dog-som-mangmiljonar/

http://www.cafe.se/burksamlarens-gyllene-hemlighet/