The Castelli Water Bottle is a must-have accessory for any cyclist. This high-quality bottle is made with a soft silicone valve that ensures easy flow of fluids, making it perfect for quick hydration on the go. The large opening makes it easy to fill and clean, while the transparent body lets you see how much water you have left. With a capacity of 550ml, it's the perfect size for a medium-length ride. The iconic Castelli logo adorns the bottle, making it a stylish accessory that complements any cycling outfit.