Patented Car Cup Holder Expander: Available in a standard-length version and a long base version. Use the quick measurement guide in the product photos to determine which version will fit your car cup holders. Expanding Base: Adjusts from 2.6"-3.8" in diameter and allows the cup holder extender to fit most vehicles. It also works great for golf-carts, UTV, ATV, vans, boats, trucks, and RV. Proprietary Retaining Tabs: Easily insert and remove bottles from the cup holder adapter. Stress free use without worrying about the adapter pulling out of the car’s cup holder. Holds drinks 2.8”-3.85” in diameter. Increased Functionality: Offsetting base adapts to most vehicle cup holder configurations. Prevents blocking the adjacent cup holder and allows two adapters to be used side by side. Built to Last: Premium materials mean quality you can feel and performance you can see. The cup holder enlarger is designed to handle even the most rugged driving conditions. We stand behind our product 100%.