Aonijie Wide Mouth 500 - ML sports soft water bottle is an ideal choice for sports hydration. It is made of environmentally - friendly and odor - free materials. With a large 4.5 - cm diameter, it is not only convenient for putting in ice cubes but also easy to clean.  The squeeze - type large - flow water - outlet design allows for quick hydration. It is compatible with most aonijie backpacks & vest.