Collapsible containment system

A collapsible containment system for handling materials having a non-stable consistency, such as a slurry, said system comprising:

• a container having at least four side assemblies each joined to each other along their adjacent edges, each said side assembly having top, bottom and side edges formed by inner and outer layers of woven liquid tight material, each side assembly joined along the bottom and side edges defining a pocket therebetween, said layers joined to each other on an upper seam spaced from the top edges of the respective layers, the inner layer having greater length than the outer layer on the top edges, said inner layer is joined to form a loading sleeve, said outer layer having a first plurality of grommets spaced therealong in a patterned array and is joined to form a closure flap;
• a stiffening member of three ply material positioned in each respective pocket of each said side assembly;
• a bottom formed of two plys of said woven material and joined to the bottom edge of each said side assembly, said bottom and said side assemblies defining therebetween a material receiving cavity;
• and
• a top member having a second plurality of grommets spaced along the entire periphery thereof, each said grommet of said second plurality being aligned with a respective grommet of said first plurality on a respective side assembly closure flap;
• whereby said container is collapsed by moving one corner diagonally through the cavity and folding the side assemblies together.