STABLE RUBBER BASE: Directly mounts car cup holder without the need for an extension base to fit console car cup holders; fits round car cup holders with a diameter of 3.0-3.25 inches, making it suitable for different vehicles such as cars, jeeps, wranglers, motorcycles, boats, trucks, and RVs Upgraded Offset Base: The JOYTUTUS cup holder adapter features an offset long base design that fits perfectly with different types of car cup holders. It uses an offset base to avoid interference with your vehicle's center console, gear shifter, hand brake, and secondary cup holders FIT MOST LARGE BOTTLES: The cup holder adapter is large enough to hold most big water bottles. It can hold most popular brand bottles ranging from 18-40 oz (3.4"-3.8"), such as Hydroflask 32/40 oz and Yeti 20-36 oz Stable & Tilt Free: The cup holder expander includes a coaster and removable rubber tabs to keep your bottle or cup securely in place, so you don’t have to worry about it tipping over when braking. For larger bottles, like a 32oz Hydro Flask, removing the tabs ensures a better fit. For smaller bottles, the tabs help prevent shaking while driving Larger U-shaped Slot for Mugs: The bottom of the U-shaped handle slot is about 0.5 inches from the bottom. Our large car cup holders can be perfectly placed in a cup with a handle without tilting or splashing. (Tip: Not compatible with Yeti 14oz mug.) JOYTUTUS Upgraded Car Cup Holder Expander