kalo925 reported an issue with a rattle in the cupholders. Here is the video he recorded showing the problem.
Roger's CT: Cup Holder Review... Design Flaw?
his suggestion was adding a piece of foam to the bottom of the cupholders. I tried this out and have driven around with cups & bottles in place. So far, so good. It seems like the foam absorbs the vibration and solved the problem.
also, the foam is 1/2" thick which raises the cup that much higher giving more "grip" room for shorter cups.
I have enough foam to cut around 20 more sets. If you are interested in a set email me at jeffpleas at gmail dot com. Pay only $3 to cover the cost of shipping.
The foam is waterproof and fits tight enough to prevent fluid from getting under the foam.