Poseidon Environmental Ltd.Logo Design Contest Logo Design Contest Contests / Poseidon Environmental Ltd. Poseidon Environmental Ltd. has selected their winning logo design. For $375 they received 142 designs from 26 different designers from around the world. Find out how LogoTournament works How LogoTournament works Contest Entries by Tonie.A Return to Contest Return to Contest Withdrawn New #31 Withdrawn New #30 Withdrawn New #28 Withdrawn Prefers others. #29 Discussion No comments yet.