Promotional product design for the annual European Ruby Conference. EuRuKo (the European Ruby Conference) is an annual conference which focuses on the Ruby programming language, with an informal atmosphere and lots of opportunities to listen, to talk, to hack, to have fun and where delegates experience distinct and insightful content from speakers of the highest calibre.Euruko2013 took place in Athens on the 28th and 29th of June 2013 at the Badminton Theater.