I ordered the 3.5 inch Drink Dockers for our 2001 Chevrolet Astro, which was missing the two cup holder inserts in front. The Drink Dockers are working out well so far. I did use one of the stick-ons on the side of each Drink Docker to make the fit snugger as it would sometimes come out when I pulled a 20 oz. soda bottle out. I do like being able to use the Dockers for my cell phone, iPod, and/or GPS.