Abstract: An automatic system for carrying a reservoir and metering liquid from the reservoir comprising a vertical shelf for storing a plurality of reservoirs therein, a transferring mechanism disposed adjacent the supply shelf for transferring a reservoir toward horizontal and vertical directions, a tilting device for receiving the reservoir and tilting it from an upright to a horizontal position, a valve mechanism for controlling a liquid flow through a valve attached to the reservoir, and a balance for supporting a collecting container to receive droppings from the valve. The transferring mechanism including a platform to support the reservoir thereon, an attracting means to draw out the reservoir, and a cylinder to move the reservoir back and forth.