Soft, collapsible, and reusable flask made with robust and durable TPU Tapered design to easily fit in running vest pockets 42mm thread compatible with water filters such as the Katadyn BeFree Back markings for measuring out liquids while cooking or mixing Tethered cap included for secure closure and rolls up compact when empty FDA approved and completely BPA, BPS, and BPF free Material: 100% TPU (Bladder), PP (Cap)
