IPow Adjustable Vehicle Cup Holder Expansion Adapter - Increase cup holder capacity: adjustable diameter 3.25-5.1 inches to fit most bottles, beverages, coffee cups, instant noodle cups, snacks, and fast-food cups. Compatible with Rambler, Hydro Flask, Nalgene, and more. - Expanding base for larger spaces: base expands from 2.68 to 3.94 inches to fit SUVs, boats, trucks, RVs, golf cars, and other vehicles. - Secure and versatile fit: firmly fixed in the original round cup slot without affecting adjacent cup holders, gear shifts, middle console cap, or car control panel. - Durable construction: made from high quality ABS material with a thicker, upgraded design to provide stable balance for your bottles. - Extra grip and ease of use: includes 3 expansion blocks made of scratch-resistant rubber for a snug, easy fit. - Broad compatibility with caveats: suitable for most vehicles; not compatible with clamshell, oval, or square cup holders. Please check your car is compatible. Use scenarios: - Daily drive: fit a large coffee cup or water bottle for easy access without crowding neighboring controls. - Road trips: accommodate oversized bottles or cup-style meals (instant noodles, snacks) for on-the-go convenience. - Marine or outdoor vehicles: secure tall water bottles or beverage containers on boats, SUVs, or golf carts during travel. This product description maintains the original brand focus, specifications, models, and functions while delivering clear, customer-friendly details.