Crusar Car Bottle Cup Holder And Collapsible Portable Car Van Vehicle Cup Holder Black Adjustable Clip Retainer Ring, the ring is mobile, you can adjust the diameter according to the diameter of the bottle or cup. Collapsible And Foldable, you can fold the holder when not use, it just takes up little space to store it. Having Pinch Cocks, they help to fix the holder on the air outlet and promise a stability to the bottle during the driving. Don't Have To Worry The Water Spilling And Bottle Rolling, this creates a more secure driving environment for you. Size:3.34"x3.74"x0.59".One year warranty. We are responsible to product within hte year.