?SHORT-TERM INSULATION? Made with high-quality aluminum foil lining, this cup holder for bike is designed to keep your drinks hot or cold for longer periods of time. The drawstring closure ensures that your bottle stays securely in place, even on bumpy roads ?MAGNETIC BRACKET? Unlike traditional water bottle bags that use hook and loop straps, our bag features a sturdy support bracket that is easy to install and keeps your bottle secure. The magnetic buckle ensures that the bracket stays in place, even during bumpy rides. And with the included zip ties, you can easily attach the cup holder to your bike without any hassle ?NOT ONLY A BIKE BAG? Our bike drink holder is designed for convenience. With its adjustable strap, you can easily carry it over your shoulder. The widened shoulder position makes it even more comfortable to wear, and the bag's lightweight design means you won't feel weighed down ?NOT EASY TO DEFORM? Crafted with 3D technology, our bicycle water bottle holder is made with a combination of aluminum foil, pearl cotton, and nylon fabric, giving it a sturdy and stylish appearance ?ROCKBROS SERVICE? With its versatile design, this water bottle holder bike is perfect for folding bikes, scooters, and wheelchairs.