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