The water bottle buckle is composed of a "D" -shaped aluminum hook, a nylon lifting strap, a metal key ring and a bottle rack ring. This bottle rack has a heavy-duty rubber sliding support. You just need to slide to a small bottle mouth. It also features a nylon strap and a metal ring, so you can attach the water bottle buckle to your key. Suitable for climbing adventures. Convenient and practical, portable, scratch-resistant design, suitable for hiking.