Abstract: A liner cassette for use with an existing intermediate bulk container includes a box and a liner. The box is configured to unfold within the intermediate bulk container and the liner is configured to fit within the box. The liner cassette includes two configurations. In a first configuration, the box and liner may be folded substantially flat to facilitate transportation. In a second configuration, the box and liner are configured to provide a liquid containment system for the existing intermediate bulk container.

Abstract: A reusable sealable plastic drum incorporates a plastic drum body with a convex upper chime having a convex chime radius, a plastic lid having an annular, peripheral mating channel sized to accept the upper chime, the channel having an inner wall, an outer wall, a mouth for receiving the upper chime, and a base surface for engaging the upper chime, the base surface having a concave radius, which is matched to the convex chime radius, and a lockband surrounding the outer wall. Tightening of the lockband causes the concave base radius to fully engage the convex chime radius in a sealing relationship.