Durable Tightening: With durable steel to fix the adjustable tightening screw and bionic alligator clip,drain hole,quite firmly to bit the cups/bottles firmly,perfect for kind off size cups holder,and the cup holder is washable,with 600D Oxford cloth,not easy to get inside wet. Heat Preservation??The inner layer of the cup holder cages is made of insulation materials,good to keep your drink warm or cold for a long time. Anti-scratched: The inner of the cup holader with protective strap to protect the bottle to get scratched,and come with the soft adheasive tape to prevent the bike bar/tube get scratched Adjustable Drawstring: The pocket of the holder cages with adjustable drawsting to tight the small bottle firmly,better to keep the drink warm or cold. Wide Application: The cup holder is universal for bike,motorcycle,ATV,scooter,wheelchair,,boat,marine ect,the cup holder comes with two little storage to place keys,cars,paper towel or the little phone,please check the size of the c