Winnicott’s concept of holding and Bion’s idea of the container-contained are for each of these analysts among his most important contributions to psychoanalytic thought. In this light, it is ironic that the two sets of ideas are so frequently misunderstood and confused with one another. In this chapter, I delineate what I believe to be the critical aspects of each of these concepts and illustrate the way in which I use these ideas in my clinical work.