A lid for covering an associated beverage container. The lid attaches to the top of the associated container and includes a central opening with an optional well portion. Heated water, or other liquid, is poured through the opening into the associated container and then circulates between the inside...http://www.google.com.au/patents/US6374726?utm_source=gb-gplus-sharePatent US6374726 - Lid for beverage container with removable inner cover
