Material: The bottle holder is made of high quality silicone. which has strong stretchability and can fit most bicycle and stroller frames. Application Scenarios: Specially designed for strollers and bikes without bottle holder mounting holes. You can place it virtually anywhere on your bike. The bottle holder can be quickly installed on the bicycle frame. the handlebars and the seat tube. Safe and firm: The mounting seat of the bottle holder is scientifically designed. the friction surface is large. and the belt has good tensile performance. and it does not fall off easily. even if it encounters strong vibrations. Green and environmental protection: The mounting base of the bicycle bottle holder is made of environmentally friendly materials that are non-toxic and harmless. allowing you to enjoy a green and healthy life while traveling low carbon. The package contains: a bottle holder. two 3 mm screws.