The tray for packs of especially liquid-secreting foodstuffs (for example, meat) is produced from a three-layer sheet, the two outer layers (11, 12) of which consist of foamed polystyrene, while a middle enclosed sheet consists of a narrower strip-shaped insert (13) made of absorbent material (for example,...http://www.google.com.hk/patents/US4702377?utm_source=gb-gplus-share專利 US4702377 - Tray for receiving foodstuffs and a process and apparatus for producing it
