Cup Holder for Large Bottles: This cup holder extender for car is large enough to hold water bottles with a capacity of 18-40 oz, a diameter of 3.0"-3.8". It fits Yeti Ramblers 18-36oz (not for Yeti 14oz Mug), Hydro Flask 32-40oz, Nalgene 16-40oz, Camelbak 32/40oz, Stanley, Contigo, and any other 18-40oz bottles, cups, or mugs (Note: This Cup Holder fits for 3.2in Diameter Cup Holder for Car, RV, Truck, UTV, Golf Cart) Sturdier Cup Holder: Designed with a solid rubber base, this plastic car cup holder expander stays firmly in place, preventing water from splashing while driving and reducing distractions Easy In, Easy Out: The simple push-in design holds your cup firmly and safely, preventing spills. Rubber flaps at the bottom stabilize the holder in your cup holder Rubber Coaster: The coaster at the bottom eliminates noise caused by the rattle of bottles and cup holders, allowing you to enjoy music without any disturbance Removable Rubber Tabs: 4 tabs inside the cup holder secure different sizes of cups stably. These tabs can also be removed when using a larger-sized cup for added convenience