Diameter Adjustable Cycling Water Bottle Cage Experience versatile hydration with our diameter adjustable Modula™ Cage. Its innovative adjustment system allows you to easily switch between standard cycling water bottles and store-bought bottled water containers—simply push a button and slide to fit. Crafted from durable engineering-grade plastic and lightweight aluminum, this cage features a push-button and sliding mechanism for quick size adjustments. The rubber cage pad protects your bottles and prevents rattling, ensuring secure and silent transport during your ride.