Patent ID: 7475792

Claim:
A beverage container comprising: a) an inner core, comprising: a body having a top, a bottom, and side walls with an inner surface forming a central chamber for fluids and a cylindrical outer surface having a circumference, the side walls of the inner core being pierced by a spiral groove running from the inner surface through the walls adjacent the bottom to adjacent the top; the spiral groove ending at a large portion adjacent the bottom of the body of the inner core; and b) an outer shell surrounding the inner core, comprising: a body having a top, a bottom, and side walls having an outer surface and an inner surface enclosing a cylindrical central chamber having a circumference fitting tightly to the cylindrical outer surface of the inner core; at least one uninsulated cooling flange forming a spiral on the outer surface of the outer shell, having an outside for heat conduction to the atmosphere and an open inside penetrating the side walls of the outer shell from adjacent the bottom to adjacent the top; and c) a drinking tube fluidly coupled to the at least one cooling flange adjacent to the top of the outer shell, extending away from the container; the spiral formed by the at least one cooling flange and the spiral groove of the inner core being matched such that: when the inner core is rotated to a cleaning position relative to the outer shell, the open inside of the at least one cooling flange aligns with the spiral gap in the inner core, and when the inner core is rotated to a consumption position relative to the outer shell, the open inside of the at least one cooling flange aligns with the outer surface of the inner core, sealing the open inside of the at least one cooling flange except at the large portion of the spiral groove of the inner core, and forming a continuous channel from the central chamber to the drinking tube, so that a user may drink through the drinking tube, drawing fluid from the central chamber through the larger portion of the spiral gap into the at least one cooling flange, and then into the drinking tube.