Soft Flask Running Bottle, 500ml350ml200ml Hydration Water Bottle, Foldable, for Marathons, Trail Running, Hiking, and Jogging, with Dustproof Caps

[What is a Soft Flask?] A Soft Flask is a water bottle made of soft resin that can be folded up compactly when empty. It's easy to drink from anywhere, anytime, for athletes. It's a foldable soft flask. Since there's no cap to open or close, it's easy to drink from; simply place it in your mouth, chew gently, and sip. [How to drink from a soft flask] These soft flasks come in three sizes: 500ml, 350ml, and 200ml. Soft flasks are designed so that you can drink the contents by lightly biting the spout and squeezing the bottle. Squeezing the bottle pushes out the water, so you can drink water without having to look up. [Compact Storage] Made with a flexible, soft material that fits snugly in your pocket. The flask compresses as you drink, so you don't have to worry about water splashing or shaking. You can also check the exact amount remaining at a glance. The soft flask's body is made of soft vinyl, so it can be folded up and made compact when empty. When not in use, the soft flask can be stored compactly, so it won't be a burden on your luggage. [Material] Made with BPA-free, food-grade silicone and durable, flexible TPU (thermoplastic polyurethane). It's harmless, odorless, and highly safe. New bottles may have a slight odor. Before first use, adding rice water, green tea, sugar cubes, or vinegar can help reduce the odor. Additionally, cleaning with baking soda is recommended. Suitable temperature: 0-40°C. A dust cover is attached to the spout to prevent stains. [Soft so it won't hurt your body when you wear it] If you use a hard bottle, it can be hard and cause pain when it touches your body when you use it for a long time. However, the soft flask is soft so it won't hurt your body even if you use it for a long time.