Made to hold Yeti: 14oz Rambler mugs & 46oz Rambler, Hydro Flask: 24oz mug, and RTIC: 36oz bottles. Check out our univeral 18-40oz cup holder for most other bottles. 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. Soft Touch Rubber Top: 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. 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%. The Swigzy car cup holder expander water bottle holder insert features an adjustable base that is expandable and allows the adapter to be a universal fit for most vehicle cupholders. This is the extra wide version made to hold the Yeti 14oz & 46oz Rambler, Hydro Flask 24oz Mug, and RTIC 36oz Bottles. It is not designed to work with any other water bottles. The expander works with many vehicles, including Tesla, Toyota, Ford, Nissan, Lexus, Chevy, GMC. Our offsetting base allows the adapter to be installed without blocking the adjacent cup holder. The Swigzy car cup holder can also be used with most golf carts, boats, trucks and UTVs.