Ah, okay. No need to rush out and buy one!
You can print out Powerpoint presentations and place them in what I call a flip-folder, which is basically a folder that can turn into a triangle so that it sits upright. Then you can flip the pages on a landscape angle.
I know that probably sounds confusing, but Office Depot carries them, so if you describe it to them, they can probably help you. When they're closed, they look like black, laminated folders. Inside, there are plastic sleeves for the pages.
I have mine printed out and it looks professional in the folder.