This silicone telescopic water bottle, made of a BPA-free food-grade silicone material. Size of this water bottle is 4.3" * 3.5"(shrink)/5.9" * 3.5"(stretch), which is a more flexible, sustainable, and safer alternative to traditional disposable plastic bottles. Whether at the gym, hiking, camping or rock climbing, there is no limit to the possibilities of use, indoor and outdoor. Other ball shape can be customized. Can customize your logo on it.