Couch armrest tray, with light. I need this.

If you have a couch in a area of the room where you cannot put an end table next to it, like against a wall for example, you will see the beauty of this gadget. It is a small tray, that clips onto the armrest of the couch. As a bonus it has a light that is 5 white LEDs so you can make sure that you are putting a cookie in your mouth and not a scorpion (i live in scorpion country). It is battery powered, which i suppose is good so you don't have yet more wires, but a plug would be nice as an option. Question is, how stable is it, and how dependent on the width of the armrest is it? Our couch, which has one side against the wall, has a quite slim, angled armrest (actually not really an armrest, since its a chaise like lounge part of the couch). I am pretty sure this thing wont work. W actually were thinking of putting a free hanging slim picture shelf over there, so you could put a glass on it. This thing would at least be a little less permanent. But the real reason to want this, is to not have to lean forward to the coffee table to get a drink. From the chaise, thats actually a pretty big pain in the ass. Get this caloric burn reducer for $19.95. via Coolest Gadgets