| CPC B65D 90/125 (2013.01) [B62D 63/06 (2013.01); B65D 88/1612 (2013.01); B65D 88/26 (2013.01); B65D 90/20 (2013.01); B65D 90/48 (2013.01); B65D 90/66 (2013.01)] | 22 Claims |

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1. A portable support structure comprises:
a plurality of frames, each configured to support one of a plurality of portable containers for discharge of bulk material from the portable container into the corresponding frame, wherein one of the plurality of frames comprises an open space therein configured to receive a blender inlet of a blender; and
a gravity feed outlet for two or more of the plurality of frames, configured to direct bulk material from the corresponding frame directly to the blender inlet in the open space,
wherein each gravity feed outlet comprises an upper end disposed within the corresponding frame, and a lower end extending from the corresponding frame into the open space.
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