A support is provided for supporting a container, such as a plastic trashbag, which is generally incapable of supporting itself in an open, upright position. The support is formed from a unitary, sheet-like blank, which is scored in at least five places to form a series of at least five axially-extending, generally parallel fold lines. The at least five fold lines define at least six panels, including a first panel, a last panel, and at least four intermediate panels. Each of the panels include a top edge, a bottom edge, a first side edge portion, a second side edge portion, an interior surface, and an exterior surface. The at least six panels are hingedly connected along the at least five fold lines to place the at least six panels in a side-by-side relation. Staples are provided for securing the first side edge portion of the first side panel to the second side edge portion of the last panel. The panels and securing means are configured to permit the support to move between a storage position wherein the interior surfaces of each of the panels are disposed in generally parallel planes, and a use position wherein the panels form a generally endless, hollow tube having an open bottom and top, and being capable of supporting itself in an upright position. Also when in the use position, the support has an interior defined by the interior surfaces of the panels for receiving the container.