COMPACT & COLLAPSIBLE DESIGN：The soft flask compresses as you drink, minimizing water sloshing and saving space in your hydration vest or backpack when empty. Designed for efficient storage during outdoor activities.
DURABLE TPU MATERIAL：Constructed from thermoplastic polyurethane (TPU). This flask is BPA-free and PVC-free, providing a reliable and practical hydration solution for everyday training and long-distance runs.
EFFICIENT HYDRATION：Features a high-flow bite valve that self-seals after each sip to prevent dripping. The narrow mouth design facilitates controlled water flow while moving. (The 1-pack option includes an extension straw for easier access without removing the flask from your vest).
VEST COMPATIBILITY：The 500ml (17 fl oz) capacity and slim profile are designed to fit comfortably into the front shoulder pockets of most standard trail running vests and hydration packs.
MULTI-SPORT APPLICATION：Suitable for various endurance and outdoor sports, including trail running, hiking, marathon training, and cycling. Built to withstand standard outdoor temperature variations.
