DromLite Bags offer high-capacity water storage yet collapse all the way down to the size of their cap. This supreme packability comes with the weight savings to match to keep you moving quickly on the trail. Reconstructed of a rugged film and RF-welded seams, they offer reliable durability. Inside, an improved BPA-free food-grade lining ensures better-tasting water and can handle freezing. Accessories like the Shower or Hydration Kits add do-all versatility, and the new svelte 3-in-1 cap lets you fill, drink and pour with ease. Extremely Compact: High-capacity yet folds down to the size of its cap for ultimate space-savings—an elastic bungee keeps it tightly folded when empty. Light: Lightweight, durable film construction is perfect for fast and light travel, backpacking and hiking. Improved Attachment: Loop at top makes it easy to hang and carry. Durable: Made with rugged film and RF-welded seams. Safe Drinking: BPA-free.