Abstract: An apparatus for use with and received within a cavity of an associated backpack, wherein the organizer includes a first housing, with a peripheral lip mounted thereabout securable to a second housing within a channel adjacent the floor of the second housing, with the second housing including a lid securable to the second housing overlying the floor of the second housing. The organizer apparatus is defined by a geometric configuration complementary to a cavity defined by the backpack. The invention further includes slidable drawers selectively positionable within compartments defined within the first housing.