LifeStraw Flex with Gravity Bag, Multifunctional Water Filter with 2-Stage Filtration for Hiking, Camping, Travel and Emergency Prevention

Takes my piss and it’s lovely to drink

Perfect for the camp as photographs depict and sensible photographs too showing the water on the boil. The bag is flexible plastic with strengthening woven outer.I took my time deciding which of these to purchase and bought 2 this one the other the clear plastic bag like type shown attached to a tree, which best suits the good practical minded person. They're simple designs and it's possible to make your own too. Amazon sells a kit to do so which of course is reusable. In the end this one won through for the sensible choice for its simplicity and thereby lack of weight when empty.