How to create custom ng-container in Anguar 4?

How do I implement my own version of ng-container so I can use this:

<my-component ...>...</my-component>

instead of this:

<ng-container my-directive ...>...</ng-container>

I am struggling to find how ng-container is implemented - maybe it is built directly into the compiler instead of as a separate directive? Is it possible to use Renderer2 to get rid of the host element?

I want a neat way to create wrapper components that do not introduce Angular host element noise in the final HTML. <ng-container my-directive> would work, but is tedious and ugly. I don't want to use <div my-directive> because that requires me to know that the component is a div (this becomes a lot more crucial once we consider nesting wrapper components inside wrapper components).

Related questions with more backgound:

Correct way to implement wrapper components in Angular 4?

Angular 2 invisible component container