A beverage can lid having a safety rim which exposes no sharp surfaces and which forms a cavity on the inner surface thereof. An upper slide piece which covers and which grips the safety rim. The upper slide piece has a push knob on its upper face. A lower slide piece which has an insert projecting upwards...http://www.google.co.uk/patents/US4746032?utm_source=gb-gplus-sharePatent US4746032 - Quick-release resealable beverage can cover assembly
