Abstract: The present invention relates to a portable reusable hazardous waste container system which preferably includes a plurality of elongate waste containers which are attachable in fluid flow communication with each other and with a drilling apparatus. The containers can be transported to a drilling site by stacking them in nesting fashion on a transport vehicle and can be emptied of drilling waste after a drilling operation is completed and retransported to another drilling site. The containers include a bracing structure at the bottom thereof which allows each container to be nested within another container without causing substantial frictional interference which would make it difficult to separate the containers for reuse. The waste container system of the present invention alleviates the need for construction of a ground pit for storage of drilling waste at a drilling site.