- Lightweight and Portable: Each pack includes two 500ml (17oz) foldable soft flasks, each weighing only 40 grams. These flasks are designed for effortless hydration while running, hiking, or exploring outdoors, making them easy to carry. - Innovative Bite Valve Design: Our high-flow bite valve offers a hassle-free drinking experience, automatically closing after each sip. This unique feature prevents drips and leaks, making these flasks perfect for runners, cyclists, and active individuals who need a trustworthy, leak-proof solution. - Dynamic Shrink Function: Experience enhanced stability and comfort as our flasks shrink when in use. This design minimizes water impact and ensures a secure fit in your hand or hydration pack, ideal for jogging, intense training sessions, or any active pursuit. - Health and Safety First: Crafted from BPA and PVC-free food-grade TPU, our bottles prioritize your safety with every drink. These durable, reusable soft bottles are suitable for all sports and outdoor activities, ensuring you enjoy safe hydration wherever you go. Use Scenarios: - Perfect for marathon training or long-distance running where quick access to water is essential. - Great for hiking trips, allowing you to stay hydrated without the bulk of traditional bottles. - Ideal for cycling, ensuring a leak-proof solution for on-the-road hydration. These flasks combine functionality and safety to meet the demands of an active lifestyle, making them a valuable addition to your gear.