How do liquids stay homogeneous and not have settling issues, such as Coke or milk?

Question

How do liquids stay homogeneous and not have settling issues, such as Coke or milk?

In: 150

Answer 1

If your milk doesn’t have settling issues that is because it’s been left to settle and (some of) the cream skimmed off, then the rest of it shaken up real good (homogenised). Fresh milk separates.

But some (most) liquids don’t do this because there’s nothing to separate. Like water – what’s going to separate out of that?