The beverage I showed is a very popular drink in Switzerland. It is a whey-based soft drink, 35% whey by volume with carbonated water and a number of secret spices. Most foreigners hate it.
But since dairy is a central part of Swiss culture, people are accustomed to whey.
On the Alps (the farms) people will draw cups of whey from the vat to drink. It's good, and healthy.
Also whey is very good for your skin (maybe those b vitamins again?) and some people even bath in it.
The whey dawn from Alpine cheeses is flavorful and fairly sweet.