Great Hydration FlaskYou will get a reusable silicone water pouch with a capacity of 550ml. Lightweight and reusable, our refillable water bottle is your perfect companion for outdoor sports like hiking, running, and biking!Safe Foldable Water PouchOur running water bottle is made of high quality food-grade silicone materich, which is eco-friendly, light weight, reusable, heat-resistant, anti-leakage, not easy to deform, BPA-free, FDA certificated, and safe to use.Portable Water BottleWith features of light weight and soft collapsible design, our water pouch is easy to carry. Come with a carabiner clip, the squeezable water pouch can be hang on your packback easy whenn fulled and can be folded flat to fit in your pocket when empty, great for outdoor sports and travelling, and it's especially easy for airport security when it's empty.Easy to CleanThe silicone water pouch (excluding the cap and neck ring) has a wide temperature range (-40C to 250C), it is dishwasher safe and can be sterilised at a high temperature. The collapsible water bottle for travel has a wide mouth design, simply unscrew the cap from the bottle to reveal the wide mouth for easy cleaning and refilling.This 550ML foldable silicone water pouch fits most hydration backpacks, ideal for outdoor activities like camping, biking, hiking. Great for gifting adventure lovers. First use: Check the cross - shaped outlet. Air pressure may block water flow initially. Use a toothpick to open it for normal use.