A support mechanism for a container includes a container coupling mechanism, a flap overlap mechanism and an attachment mechanism. The container coupling mechanism is configured to couple to a distal end of a first flap of the container. The flap overlap mechanism is configured to overlap a second flap of the container when the first flap and the second flap are in a closed position, such that the second flap is between an interior portion of the container and the flap overlap mechanism in the closed position. The attachment mechanism is configured to selectively maintain the first flap and the second flap in the closed position. The support mechanism supports a greater force applied in a direction normal to a plane formed by the first flap and second flap in the closed position than a force supported by the first flap and the second flap without the support mechanism.