Tank

A tank including a bottom portion, sidewall portions and endwall portions molded as an integral structure with a top opening, a plurality of support sections spaced about the periphery of said structure and integrally molded with said bottom and wall portions, said support sections including inward buttress sections extending from said bottom portion upwardly toward and terminating adjacent the free edges of said portions, said buttress sections forming depressions in the exterior surfaces of said bottom and wall portions, each of said buttress sections including a main surface that is spaced from said wall portion adjacent said bottom portion and converges toward said wall portion adjacent the free edge thereof, said support sections including inward base sections extending upwardly from said bottom portion a fraction of the height of said wall portion, said base sections forming depressions in the exterior surfaces of said bottom and wall portions, each of said base sections including a main surface disposed substantially parallel to and spaced from said wall portion, each of said base sections including a top surface substantially parallel to said bottom portion, said base sections being disposed between said buttress sections, said base sections being disposed along one wall portion in positions staggered from the positions of buttress and base sections disposed along an opposite wall portion.