1. Soft water bottle is designed specifically to carry and dispense carry gels, water, electrolytes, or your own nutrition mix and easy cleaning 2. Running foldable soft bottle widely used for outdoor activities, mountain bike, cycling, running, hiking, gym, mountaineering, traveling, rock climbing, swimming etc. 3. TrailFlask bite mouthpiece is baby-grade silicone nozzle , can be reused, rest assured and reliable. 4. Outdoor collapsible water bottle 500ml has high-flow bite valve auto-seals after each sip, no leaking 5. Running Collapsible soft bottles can not add hot water into bottle to protect it