Beer dispensing that runs without a bartender behind it. A bottoms-up dispenser fills through a magnet in the base of the glass, which is what makes it fast and takes the foam out; self-pour units and countertop beer vending do the same job on a tab.
It fills the glass from the base through a magnetic valve in the cup, which reseals as the glass lifts away — fast pours with far less foam and waste, which is why stadiums and festivals use them.
Yes, on the self-pour stations and the touchscreen vending machine — they meter by volume and bill by the millilitre or ounce, so staff stay on service instead of on the tap.
No — this shelf is the pouring end of a draft beer system, so the keg still needs a kegerator or beer cooler behind it to stay cold.