Material: The bottle cage holder is made of high quality silicone material that is highly stretchable and fits most bike and stroller frames.Application scenarios: specially developed for prams and bicycles without bottle cage mounting holes. You can place it practically anywhere on your bike. The bottle holder can be quickly mounted on the bike frame, on the handlebars and on the seat tube.Safe and secure: The bottle cage mounting seat is scientifically designed, the surface friction is large, and the strap has good tensile strength. It is not easy to fall even when subjected to strong vibration.Green and environmental protection: The bicycle bottle cage mounting base is made of non-toxic and harmless green materials, so you can live a green and healthy life while traveling with low carbon.The package includes: a bottle cage bracket, two 3mm screws.