Believe it or not, I really understand. I'm not laughing at the idea, but the comments. They're so funny.
Talk about silly, I placed 4 used bottle caps under my PC desk as a heightener just to give room to place the case under it in a standing position. Again, "used"
That and a few more "mods" I make on my PC. :P
A cup holder is quite normal. They use it in cars, why not PCs?