An apparatus for enabling enhanced, selective agitation of a liquid, comprising: at least one liquid-bearing container having a first end and an opposite second end; a circular tray adapted for selective rotation about a vertical axis of rotation and having plural container-receiving stations arranged on the tray radially from the vertical axis, each station adapted to receive and selectively retain a respective liquid-bearing container in an orientation whereby the container is inclined with respect to a horizontal plane and whereby the first end of the container, proximate the axis of rotation, is disposed lower than the second end of the container, distant from the axis of rotation; and a motor in driving engagement with the tray and adapted for selectively rotating the tray, characterized in that the at least one liquid-bearing container comprising at least one internal baffle (56,58) for imparting turbulent agitation to the liquid within the respective container when flowing from one end of the container to an opposite end thereof and wherein centrifugal force commensurate with rotation or rotational acceleration of the tray, causes the liquid in the at least one container to travel from the first end of the container to the second end of the container and thereby to agitate said liquid when it flows through the at least one internal baffle (56, 58), and wherein gravitational force associated with a cessation of rotation or rotational deceleration of the tray, causes the liquid in the at least one container to travel from the second end of the container to the first end of the container and thereby agitates said liquid when it flows through the at least one internal baffle (56, 58). at least one liquid-bearing container having a first end and an opposite second end; a circular tray adapted for selective rotation about a vertical axis of rotation and having plural container-receiving stations arranged on the tray radially from the vertical axis, each station adapted to receive and selectively retain a respective liquid-bearing container in an orientation whereby the container is inclined with respect to a horizontal plane and whereby the first end of the container, proximate the axis of rotation, is disposed lower than the second end of the container, distant from the axis of rotation; and a motor in driving engagement with the tray and adapted for selectively rotating the tray, characterized in that the at least one liquid-bearing container comprising at least one internal baffle (56,58) for imparting turbulent agitation to the liquid within the respective container when flowing from one end of the container to an opposite end thereof and wherein centrifugal force commensurate with rotation or rotational acceleration of the tray, causes the liquid in the at least one container to travel from the first end of the container to the second end of the container and thereby to agitate said liquid when it flows through the at least one internal baffle (56, 58), and wherein gravitational force associated with a cessation of rotation or rotational deceleration of the tray, causes the liquid in the at least one container to travel from the second end of the container to the first end of the container and thereby agitates said liquid when it flows through the at least one internal baffle (56, 58).