UPmall Collapsible Water Bottle - Medical Grade Silicone Leak Proof Foldable Sports Bottle 750ml (26 oz) Medical Grade Liquid Silicone SAFE & ECO-FRIENDLY - This bottle is made of medical grade (better than food grade) BPA-free silica gel and non-toxic, odorless material; approved by FDA in the U.S. Made from 100% medical-grade material. INNOVATIVE WAY TO HYDRATE - The perfect hydration solution for anyone with active lifestyles. Soft and collapsible design sport bottle, saves space when it's put away and makes it portable for outdoor use; its innovative air valve allows air to fill up the bottle and stands straight, even when it's empty or contains only a small amount of liquid LARGE CAPACITY & LEAK-PROOF--Large capacity water bottle of 750 ml, and only 155 g in weight; allows you to hydrate your body at any time; enjoy the outstanding design and convenience of this bottle compared to most products on the market. A check valve design prevent liquid to go out even if you hold it upside down EASY CARE & USE BENEFITS - Practical to use. Wide-mouthed (63 mm) design makes the bottle easy to clean the interior or add water and ice; the leak proof one-button switch opens the cap easily; the lock ring prevents the bottle from accidentally opening SPACE SAVER- Lightweight, easy to fold up to 1/3 size when it's not in use due to its soft material. A plastic ring design make the bottle easier to hang, use a carabiner to hang it to your bike, waist belt or hiking bag, backpack, and luggage. Great for traveling, fishing, exploring, daily walking, camping, cycling, hiking, running ,yoga, exercise and gym