A closure for a container is provided which includes a collar engaging the opening of the container, and a removable cap pivotally hinged to the collar by means of a double-fold hinge. When closed, the cap fits over the collar. The arc of travel of the cap as it pivots between its opened and closed position...http://www.google.com.au/patents/US5531349?utm_source=gb-gplus-sharePatent US5531349 - Flip-top closure
