Patent ID: 8875964

Claim:
A collapsible backpack cooler comprising: (a) a back member for engagement with a wearer's back; (b) a curved base extending from a bottom portion of the back member; (c) one or more collapsible sidewalls secured to the back member and the curved base, an outer surface of one or more of the one or more collapsible sidewalls tapering downward in a discrete stair-step fashion as it approaches the curved base; (d) one or more straps secured to the back member, the one or more straps being configured to allow a wearer to secure the collapsible backpack cooler to his or her back; (e) a lid configured to provide access to an enclosed interior storage space collectively defined by the lid, the back member, the curved base, and an inner surface of one or more of the one or more collapsible sidewalls; (f) wherein the curved base is secured to the back member in a manner which allows rotative movement of the curved base generally upwards about a pivot axis at a bottom portion of the back member; (g) wherein the collapsible backpack cooler is transitionable, via rotation of the curved base relative to the back member, between (i) an expanded configuration, in which the curved base extends generally horizontally out from the back member and the interior storage space has a first volume, and (ii) a collapsed configuration, in which the curved base extends generally vertically upwards and the interior storage space has a second volume less than the first volume; (iii) wherein the interior storage space is fully enclosed in both the expanded configuration and the collapsed configuration when the lid is closed.