Abstract: A polyethylene shipping drum especially suited for shipping hazardous materials is disclosed. The drum comprises a molded container and closure which are threadably connected to each other to form a seal therebetween. A thread lock is provided for the threaded connection between the container and closure. The container has a plurality of indentations in the side wall thereof to provide ledges for stacking the containers one inside the other in a stable, nested relationship. An annular rim is provided on the closure with an inclined annular surface for retaining the sealing gasket in a groove without adhesives.

Abstract: A secondary containment apparatus for use in combination with primary containers for hazardous wastes such as drums or large barrels, comprising a generally rectangular base member and two generally rectangular lid members of a size sufficient to enclose one or more primary containers. The lid members are moveable only laterally in relation to the base member, the lateral movement allowing access to the drums contained within. The lid members have interlocking means to form a releasable closure, and have engagement means for attachment to the base member. The base member is impermeable to liquids, and is preferably composed of translucent plastic for visual inspection.

Abstract: A molded polyethylene salvage drum for containing hazardous wastes has a container having a solid side wall and a lid having a circular double-walled body. The container has a top portion provided on its exterior surface with male threads, an enlarged portion adjacent the threads, and a lower side wall portion adjacent the enlarged portion. An annular shoulder is formed on the container between the portion of enlarged diameter and the lower side wall. The lid has a skirt depending from the body of the lid. The interior surface of the skirt is provided with female threads mating with the male threads of the container. Castellations project upwardly from the lid body around the periphery thereof. The lid is molded so as to provide a plurality of kiss-off sections, in which the two walls of the body are molded together during rotational molding of the lid.