Patent ID: 7635013

Claim:
A method for adding liquid to a liquid container of an engine: providing a cap assembly for a liquid container comprising; a base dimensioned to be coupled to an opening of a liquid container, said base having a bottom portion and an annular side wall coupled to said bottom portion; a lid having a top portion and an annular side wall coupled to said top portion; threading coupled to an inner surface of said annular side wall of said base; threading coupled to an inner surface of said annular side wall of said lid and dimensioned to removably mate with said threading coupled to said annular side wall of said base; a telescoping funnel, a bottom portion of said telescoping funnel coupled to an inner surface of said bottom portion of said base; at least one slot defined by a top portion of said telescoping funnel; and at least one protrusion coupled to an inner surface of said annular side wall of said top, said at least one protrusion dimensioned to engage said at least one slot so that said lid being detachably coupled to said telescoping funnel; twisting said lid in a first direction to disengage said threading of said inner surface of said annular side wall of said lid from said threading of said annular side wall of said base; pulling upwardly on said lid to extend said telescoping funnel; twisting said lid in a second direction, said second direction being opposite from said first direction, to disengage said at least one protrusion from said at least one slot; and pouring liquid into said top portion of said telescoping funnel.