Appears to be a garden-variety refrigerator, using cold water as the heat exchanger. I can see how they could have a market in UK where refrigerators are the size of dorm refrigerators, but I can’t see the benefit in the US.
The video showed the doorless cooling units that are typical in grocery stores. Such units are undoubtedly not energy efficient.
Idea seems to be to store aluminum can beverages at room temperature. Aluminum can and "wind chill" effect of water bath in conjunction with spinning can cool off product when purchased.