High Quality Content by WIKIPEDIA articles! The Plastic People of the Universe (PPU) is a rock band from Prague, Czech Republic. It was the foremost representative of Prague`s underground culture (1968–1989). This avant-garde group went against the grain of the Communist regime and due to its non-conformism often suffered serious problems such as arrests. The group continues to perform even after the death of the founder, main composer and bass player, Milan "Mejla" Hlavsa.