You can either use your web browser's bookmarks or favorites for this purpose (simply deleting the bookmark once you're done reading it), or a read-it-later app like Pocket, Readability or Instapaper. Others may have their own favorite similar kinds of apps they could recommend.

All of these kinds of things will work with any website, so you don't have to rely on a particular website to provide this functionality.

Best,
DocJohn