• FOOD GRADE TPU: The 500ml hydration flask is made of high quality food-grade TPU frosted material carefully crafted to ensure durability. 100% BPA and PVC free, non-toxic and odorless, drinking safely with UTOBEST flexible flask.
• EASY DRINKING：Soft water bottles for runners Bite valve allows quick, pleasant water supply with no leaking and quick access to water during motion as well. The running vest water bottle has wide opening, easy to fill or clean and comes with a dust cover for health and safety.
• HANHELD AND PORTABLE: UTOBEST flexible water bottle is soft and foldable, easy to use, easy to store, let your running more easily; UTOBEST hiking soft water bottle can be frozen and chilled overnight, easily get a refreshing beverage on the hot day; (Recommended used temperature: -20 ℃ ~ 40 ℃ / -4℉ ~ 104℉)
• VERSATILE BOTTLE: 250ml /8floz Capacity. This water flask collapsible provides the necessary amount of water for your outdoor sports like running, jogging, hiking, camping, etc.;Running water Can perfectly fit in most hydration vests and backpacks.
• LIFETIME WARRANTY- You will get 1 Pair of 500ml flexible bottle, We offer a lifetime warranty on our packable waterbottle.