Compatibility: Fits Most Cars, Trucks, Boats, Golf Carts, RVs ( With 32oz/40oz Hydro Flasks,32oz/40oz Nalgenes, 36oz Yeti Ramblers, 32oz/40oz Klean Kanteens and other big size bottles) Color: Black Dimensions: 3.7" diameter top of cup, 2.3" diameter bottom of cup. Features: 1.Water cup holder for the design of the hole is also easy to place a small diameter of the bottle. 2.Eccentric structure:fit a variety of models of the cup seat caliber 3.The detachable silicone petal structure: avoid shaking when you place a small cup. By the way, if your cup is enough big, you can take it off which you will not feel it's too tight for your big cup. 4.Can be placed with a handle of the cup 5.Durable and portable 6.French Fry Holder: Keeps Fries secure and steady in car cup holder slot