Completely collapsible for superior packing efficiency, our water storage and delivery systems are perfect for everything from sea kayaking to alpine from trekking to road warrior-style expeditions. Armed with incredibly tough 1000-Denier exteriors and now laminated with an improved BPA-free food-grade lining for better-tasting water, these bags can handle freezing and the abuse inflicted by expedition crews and hardcore adventurers. The new 3-in-1 cap lets you fill, drink, pour and wash with greater ease.