This Monkii clip and cage is designed for the Brompton folding bikes. It enables you to fit other monkii cages, monkii mono waterproof bag or monkii wedge tool bag for mounting on the tapered end of Brompton head tube near the handlebar area. The Monkii clip for the Brompton wont interfere with folding your Brompton or your riding position. The location is perfect for grabbing your drink. The clip is a perfect snug fit and will not scratch or damage your paint. This includes the Monkii clip and cage and velcro adjustable strap so you can fit many different bottle sizes.