360 rotatable design: with the 360-degree rotating clamp, the bike water bottle holder can be installed on the handlebar, down tube, front fork, front tube, and be adjusted to any angle to meet your actual need. No need to worry about the water bottle falling outUniversal water bottle cage : our water bottle holder for bike is compatible with most sizes of bike water bottles, and can fit folding bike, road bike, mountain bike, e-bike, women's bike, stroller, and so onAnti-slip & secure : the water bottle cage comes with 4 black gaskets and 2 clips, which can help to hold your water bottle firmly, keep it in place and effectively prevent it from falling off your bikeFlexible bike cup holder : the bottle holder measures 5.8inch14.7cm in length, and 2.5inch6.5cm in diameter. Besides, the adjustable clamp diameter is 0.8-1.6inch2-4cm. You can rotate the screw on the holder to adjust the tightness of the clamp so as to fit your bike perfectly