For large bottles and wide cups: This car cup holder extender fits water cups with a diameter up to 105 mm. The base is adjustable, and the telescopic diameter ranges from about 65 to 100 mm. The fixed key features an antislip silicone sheet to help secure the cup. Upgraded offsetting function: The offset mechanism lets you the cup holder position. Loosen the bolt to offset the base in any direction to avoid interference with your vehicle's center console, gear shifter, or other cup holders. The adjustable offset design also enables configuring two cup holders side by side, even in tight spaces. Antislip coaster and tabs: A silicone coaster and inner inserts help keep cups and bottles securely in place and upright, reducing tilt and spills. Extendable base: Suitable for most vehicles, including cars, trucks, SUVs, and recreational vehicles. The cup holder expander can be firmly attached to different car cup holders. Use scenarios On long road trips, securely hold a tall water bottle in the front cup holder without wobble or leakage. In a compact car, use the offset function to avoid interference with the center console or gear shifter and create a second cup holder side by side in tight spaces. In SUVs, trucks, or RVs with varied cup holder shapes, attach the extender to different cup holders to improve stability and accessibility for multiple beverages.