Closed vessel, double-duty rigid intermediate bulk containers ensure the integrity and safety of highly toxic liquid and powder products by managing the blending, discharging, shipping and storage operations within a single vessel to minimize material contamination, product handling, environmental contamination and cost. A wide range of container sizes, shapes and designs is available to meet diverse material handling requirements and mixing/blending applications. Containers may be typical side-door units with straight walls or hopper containers with angled walls below a straight-walled upper section, or custom-engineered variations. Single vessel mixing, blending and storage ensures containment and integrity of highly toxic ingredients to minimize contamination, material handling and clean-up. The specially designed container is placed onto a fill station to receive the correct proportion of dry ingredients. The container can then be shipped or stored for later use. When ready for use, the container is moved into a Tote System blender cradle that clamps and rotates the closed container to mix the ingredients for in-bin blending. Special wall-mounted or lid-mounted intensifying mechanisms are available for containers storing heavier or moist products that tend to agglomerate.