Abstract: A rotary gravity mixer for inducing turbulence in a liquid preparation such as developing lacquer to produce a substantially uniform suspension of pigment within the liquid vehicle of the preparation is disclosed. A container of the preparation is held in eccentric relation within an open ended cylindrical carrier by a cylindrical clasp. The carrier cylinder is received by a pair of roller bars which define a turn cradle for supporting the carrier cylinder for rotary movement. The open ended cylindrical clasp extends transversely through the carrier and is anchored to the carrier on opposite ends whereby its longitudinal axis is inclined with respect to the longitudinal axis of the carrier. The clasp is a relatively smaller diameter, cylindrical sidewall section which is severed along its length to permit the clasp to be spread upon to receive the container and which holds the container in resilient gripping engagement.