A carrier structure includes a lower platform substantially parallel to a ground surface upon which the carrier is placed and moved a back wall connected to a back edge of the lower platform at a connection structure, the back wall and lower platform defining a first angle a front wall connected to a front edge of the lower platform and opposing the back structure opposing side walls connected to opposing side edges of the lower platform, the back, front and opposing side walls forming a compartment wherein the back wall is tiltable away from the front wall to define a second, obtuse angle, between the back wall and the lower platform, such that the lower platform is configured to remain substantially parallel to the ground surface.
