Amphipod Soft-Tech Minimalist Handheld 16 ounce hydration flask. This compact and lightweight bottle holds up to 16 ounces of water, making it the perfect size for a quick jog or hike. Crafted to literally shrink as you take more sips, while the Thumb-Lock™ design and adjustable sling protect your hands from cramping up, carrying fluids has never been easier! With an expandable zipper pocket for essentials and gel slots on a padded handle, your adventures just got an upgrade.