Review on Gadjit Cup Keeper Convenience Diameter by Brent Peterson

Works perfectly after a few custom modifications! I always just cut off a little bit from the bottom so it sits deeper in my existing cup holder. Then I taped the soft side of the velcro around the "adapter" where it makes contact with my existing cup holder. but nice and cozy. It cannot tip over because the "adapter" never touches the bottom of my existing cup holder. It's perfect. and I'm 100% happy. If you're willing to make a few changes to your application, I'd give this "adapter" a try.