A modular container for storing and dispensing liquids which has a body, an upper protecting wall, a lower protecting wall, at least one connector port with a valve, preferably a second connector port attached to a tube that extends upwards into the interior of the body, and a level indicator. The first and second connector ports are attached to the bottom of the body and incorporate a connector and are connected through an opening in the lower protecting wall. The lower protecting walls of the container are such that they have the ability to nest within the upper protecting walls of additional containers, thus allowing two or more containers to be stacked one on top of another. The second connector port which is attached to the tube extending into the interior of the body can be used for the purpose of venting the interior of the body and for cleaning the inside of the container without the necessity of moving or transporting the container.