TRAVEL YOUR WAY: Travel with ease & comfort. The Ultimate Expander cup holder installs into your vehicle’s cup holder in just seconds and holds your water bottle, thermos, or mug in a firm, snug fit with 3 rubber tabs for oversized bottles. Travel with your version of YETI, RTIC, Nalgene, Hydro Flask, CamelBak, and more. STAYS FIRMLY IN PLACE: Enjoy a bit of rough terrain? An adjustable base is the only way to accommodate all beverage flasks, keep a lid on them, and avoid spills. The Ultimate Expander features a 3-ring expandable base with a diameter range of 2.5”-3.75” to keep it firmly in place in most cylindrical cup holders, regardless of terrain type DRINK FROM YOUR FAVORITE MUG: We all have one! Coffee just tastes better from that familiar mug. Bring it with you on your commute – no transfer required. The Ultimate Expander features an integrated mug handle slot so your cuppa joe slides in with ease. Fit your 14oz YETI Rambler, 10oz YETI Rambler, most standard household coffee mugs, and many more. SIMPLE INSTALLATION & A UNIVERSAL FIT: It couldn’t be easier! 2 steps & 5 seconds is all it takes to fit your car’s cup holder with the universal fitting Ultimate Expander. Simply hold the base and twist the top. The base will retract or expand to custom fit your cup holder. No tools, no hardware, no problem. Every vehicle should come with one of these! Did we mention it makes an excellent gift