Invisible liquid

I suggest adding an invisible liquid. It will work exactly like the barrier block: it's invisible, you can only see it when you are holding the item you placed it with, and can't be obtained in survival. the single difference is it is a liquid. now, how can it be useful? Well, it could work exactly like water, moving you around and keeping corals alive. Maybe use it to have an active conduit without normal water annoying you. These are just some examples, i'm sure this community can find lots of other uses for it!