Whether we're setting up camp with friends for a weekend in the woods or overlanding through dry, remote terrain, we pack along the LifeStraw Peak Series Gravity Water Purifier System. The huge eight-liter capacity stores plenty of water to fill our bottles for hikes, and the gravity-fed filter is exceptionally simple to use. The Membrane Ultrafilter ensures that we have good, clean water no matter where we go, filtering everything from particles to bacteria and viruses, and the bag's durable construction allows us to easily carry heavy loads of water to the campsite. When we don't need the full eight-liter volume of the storage bag, we can remove the filter and straw and enjoy clean, fresh water on the go.