a pump arrangement , particularly a magnetic clutch pump arrangement , is provided . the pump arrangement includes a containment can with a central longitudinal axis which hermetically seals an enclosed chamber with respect to the inner chamber formed by the pump housing . the containment can has a base with at least one bead extending into the inner chamber . the at least one bead is radially spaced from the central longitudinal axis of the containment shell by at least one defined distance relationship . a method for producing a such containment can for a pump arrangement is also provided .