Finally got to vote (dratted phone doesn't do polls) but I forgot I like those protein shakes too (whey) especially chocolate with a shot of espresso and salted caramel flavour... They can be like a smoothie.
In terms of quantity, the answer has to be water. We're fortunate that we have pretty good tap water here in the Chicago area... piped out of Lake Michigan. Neutral taste, not much in the way of minerals. When our town switched from well to lakewater a couple of decades ago, I was able to disconnect the water softener with no ill effects.
For a taste treat, it would have to be Sprecher's Creme soda. (Yeah, their beers are outstanding as well, if you can get them where you are)