Package Contains: One Bike Bottle Mount Seat, One Bike Bottle Holder, Two 3mm Screws Material: The bottle holder is made of high quality PC material, which has good toughness and is not easy to break. The bottle holder is made of high quality silicone, which has strong stretchability and is suitable for most bicycle and stroller frames. Usage scenarios: Specially designed for strollers and bicycles without fixing holes for bottle holders. You can place it virtually anywhere on your bike. The bottle holder can be quickly mounted on the bicycle frame, handlebar and seat tube. Safe and firm: The bottle holder mounting seat is scientifically designed, the surface friction is large and the webbing has good tensile strength. It is not easy to fall off even when exposed to strong vibration. Green and environmental protection: The bottle holder and the bottle holder are made of non-toxic green materials and harmless, allowing you to live a green and healthy life when traveling with low carbon.