The Invention provides a waste storage device comprising a main body and a lid, the main body including a waste aperture inlet arranged to receive a storage bag, the lid comprising storage bag severing means movably mounted thereon and a formation arranged to hold the storage bag against movement relative...http://www.google.com.hk/patents/US6128890?utm_source=gb-gplus-share專利 US6128890 - Waste storage device
