Bathtub
The bathtub is used for relaxation as much as for cleansing the body. In this way, it can symbolically connect to either, depending on your personal associations with it. From a structural standpoint, because a bathtub contains a small amount of water, it is also an emotional symbol and should be considered from the perspective of containing small amounts of emotional expression that can either relax you or overwhelm you, depending on the dream context.