Contain:  TO HOLD.  To compromise; to have it in ME. To measure; to be equal to ME. To take up, occupy.  To enclose.  To hold together.  To keep under control, restrain, restrict, confine,; to retain.  To restrain oneself; be continent, keep oneself in chastity.  The action or fact of containing; holding; restraint. (Shorter Oxford English Dictionary 3rd Ed. Clarendon Press, Oxford, 1973)  Suppose this could be said to apply to all walks of life, not just ceramics.

Just saying!