Well im sick today so i figured id post a few pics of my cupholder inserts. Im kinda nuts when it comes to noise and couldnt stand cans/bottles/cups bouncing around spilling and making noise. So i got some rubber inserts from a 98 Chevy Malibu and trimmed them to fit. I even trimmed them so you can put in a cup with a handle. It works great and looks way better than just crappy plastic. It took about a day for the rubber to form to the hole as you can see in the pic its kinda wobbly lookin. If you are a big gulp kinda person then these can be removed easily.

http://photobucket.com/albums/e266/4RunnerDNA/