Jockey box

A jockey box is an insulated container containing ice and water, as well as a long coil of hollow tubing. The device is used to cool beverages being served on tap in temporary locations.
One end of the coiled tube in the box is fitted to the external supply of the beverage to be served.
A glove compartment is also sometimes referred to as a "jockey box," especially in the U.S. Upper Rocky Mountain states.
For the prior-to-use cleaning, use a flush-out hose to remove any residue or mold that might have built up inside the lines since the last time you used the jockey box.

Alternative Portable Cooler Dispensers

In the coil cooler, a stainless steel coil is covered with water and ice, in which the liquid is made to run through. At the contact with the cold coil, the beverage becomes cold.
On the flip side, the cold plate works making the beverage run across an ice covered aluminum cold plate. When the plate makes contact with the ice, the plate become cold provoking the liquid that runs over it becomes cold too.
A portable ice maker and water dispenser is a device that produces ice, and release chill water by a small in-house generator. Depending on the size, some of them require a water line connection, but most of them only needs to have water deposited in its container.