The adjustable bike bottle holder is a reliable companion for every cyclist. With it, you'll always have your favorite drink at hand. Here's why you should choose it: Size adjustment: With its adjustable feature, you can easily fit your bottle or place a bottle of your favorite drink in it. It accommodates bottles and containers with a diameter ranging from 4.5cm to 7.5cm. Durability: Made of durable plastic, it's resistant to cracking and various weather conditions. Whether you're riding in the sun, rain, or winter, the holder will serve you for a long time. Easy installation: The set includes two mounting screws, allowing you to easily attach the holder to your bike. Technical specifications: Material: durable plastic Supported bottle/container diameter: 4.5-7.5 cm Additional information: two mounting screws included