Abstract: A manual mixing apparatus includes an elongate member extending along a longitudinal axis from a first end to a second end. The elongate member includes a first surface and a second surface separated by an opening or a flow passage therebetween. In one embodiment, the first surface and the second surface are concave so as to direct fluid towards the opening or flow passage. In one embodiment, the apparatus includes a flow separating structure located in relationship to a flow passage such that fluid flowing through the flow passage is divided. In yet another embodiment, the apparatus includes a paddle portion and a conical surface coupled to the paddle portion.