a dishwasher tub is provided with containment structure which prevents liquid from leaking around a door seal . the containment structure includes a bead that extends along side portions of a front flange of the dishwasher tub . at each lower portion of the front flange , the bead includes an inward and downward extending portion which leads to a substantially vertical portion , and finally to another inward and downward extending portion . the final two portions of the bead are arranged along a reduced dimension section of the front flange and define a trough which guides the liquid back into the tub .