Pouches are great for storing water. Work well with the sawyer squeeze and mini filters. Would be 5 stars if it had the cap somehow attached to the pouch while filling so that you dont loose it. Which tends to happen quite a bit. Plastic bottle caps can be used as a quick replacement.
I switched to the Sawyer filtration system some time ago. Pump filters are too bulky and heavy. This is just the pouch but they are strong and last well. When empty they compress to a small flat sized object and are thus easy to pack. I like these a lot.