Any way to make a portal with water in it without spawning in flowing water blocks?

So I needed to make a portal with flowing water in it to be the filling material. The problem is that I don't want to spawn in flowing water blocks 'cause if I can avoid spawning in something I don't.

So is there any way of making water not flow to the sides in vanilla MC nowadays?


If I am correct, you want something like this:

  1. enter image description here
  2. List item
  3. enter image description here

There is no better way for doing this without commands / MCEdit.

Maybe in 1.13 there will be a trick to to this.

However, I do not see any point in your question, as I can't imagine any situation where this would be useful.