• FOOD GRADE TPU: The 500 ml 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: The soft water bottle for runners features a bite valve for quick, leak-free water access during motion. The running vest bottle has a wide opening for easy filling and cleaning and includes a dust cover for health and safety
• HANDHELD AND PORTABLE: The UTOBEST flexible water bottle is soft, foldable, and easy to store, making your run easier. It can be frozen overnight for a refreshing drink on hot days. Recommended temperature: -20°C to 40°C / -4°F to 104°F
• VERSATILE BOTTLE: 500 ml (17 floz) 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
• WORRY-FREE SUPPORT: You will receive 1 pair of 500 ml flexible bottles. We offer continued support for our packable water bottles