A bottle cage is a device designed to securely hold a water bottle on a bicycle frame. Typically made of lightweight materials such as aluminum or carbon fiber, these cages feature a simple and open design to facilitate easy access to the water bottle while riding. The cage is attached to the bicycle frame using screws or bolts and is strategically positioned for convenient hydration during cycling activities, ensuring that the rider can stay hydrated without having to dismount or reach too far. Bottle cages come in various styles and designs to accommodate different types and sizes of water bottles.