Abstract: An apparatus for forming a plurality of batteries, comprising a fluid containing body having a base and opposing side walls, a series of supports positioned at the corners of the body defined by intersecting side walls, a fluid inlet manifold connected to a first side wall and communicating with the body, and a fluid outlet manifold connected to a second side wall horizontally opposing the first side wall and communicating with the body, wherein the body, the legs, the fluid inlet and the fluid outlet comprise a unitary structure. The apparatus is particularly adapted for stacking in a vertical array, providing a cascading fluid arrangement, by positioning the fluid outlet of a first, upper apparatus in vertical spaced relation to the inlet of a second, lower apparatus.