The kegs are stored in large coolers located some distance from the actual tap. The taps are connected to the delivery system through insulated lines. The beer in the lines are under moderate pressure, and when the tap is opened, beer is drawn from the keg through the lines.
Draft beer is far more profitable than bottled beer, and takes less storage space.
Most systems are designed to maintain the temperature of the beer in the coolers. Real world experience tells us this approach is often not good enough. Chill-Pak is the only system specifically designed to chill beer in the delivery lines, and at the point of delivery. So the beer is served at a consistent temperature, regardless of variations in the cooler. The Chill-Pak system uses glycol to refigerate the product delivery lines.