【Upgraded Cup Holder Expander】 Simply turn the rotation ring to open the cup holder arms, insert your cup and gently push the cup holder arms inward for a perfect auto-lock fit. Whether you have a skinny travel mug or a bulky water bottle, our car cup holder expander automatically adjusts to provide a secure, stable fit. 【Extra-Large Capacity for Big Beverages】 This cup holder expander securely holds large containers from 12oz to 64oz. This car cup holder expander fully compatible with Yeti, Hydro Flask, Nalgene, and other popular tumblers and water bottles in 2.6"- 4.8". 【360° Anti-Spill & Anti-Slip】 Made of thickened PC material with built-in non-slip padding, this cup holder for car offers shockproof and scratch-resistant support, preventing spills even on bumpy roads. 【Adjustable Base for Broad Vehicle Compatibility】 The expandable base of the cup holder expander widens from 2.56" to 3.93". making this adjustable cup holder expander suitable for most cars, SUVs, trucks, RVs, and boats. 【Tool-Free Installation】 Install this cupholder expander in seconds without tools. The open-side slot of the car cup holder expander allows easy access for mugs with handles, adding everyday convenience. 2Pack Cup Holder Expander, Car Cup Holder Expander Compatible with Yeti, Hydro Flask, Nalgene, Takeya, Camelbak, Owala Tumblers, Ramblers, Mugs, Large Bottles in 2.6"- 4.8", No Tools Required