- Premium Insulation: Made from durable Oxford cloth and thick aluminum foil, this bike cup holder is both waterproof and heat-insulating. It effectively maintains your beverages at the desired temperature—keeping drinks cool in the heat and warm when it’s cold. - Secure Closure: Featuring a self-adhesive tape and pull cord design, this holder ensures your bottle stays firmly in place, even during bumpy rides. It also protects your water bottle and mobile phone from accidental drops. - Stable Attachment: The two-point attachment system guarantees that the cup holder remains secure on your bike, capable of handling rough mountain trails. It fits roll cages with a diameter of 0.4 to 3 inches without sacrificing stability. Additionally, the built-in drainage hole simplifies cleaning and water drainage. - Versatile Fit: Designed to accommodate most water bottles, the drawstring feature allows for easy adjustments, making it an ideal accessory for biking, scooting, or even strolling with a stroller. Carry your drink with ease, no matter your activity. - Practical Applications: Perfect for long bike rides, outdoor adventures, or daily commutes, this cup holder is essential for staying hydrated while on the go. Its robust design ensures your drink is always within reach, whether you’re tackling trails or running errands.