Getting stuck outdoors without clean water is not a lot of fun. The good news is you can use devices like Light Water to purify any water. Light Water weighs 220 grams. It is compact enough to fit in your pocket or bag and can clean 9L of water in 10 minutes. Light Water removes viruses, bacteria, and other dangerous chemicals from the water.
Light Water uses a filter and UV light to purify water effectively. You can combine it with filters from other brands too.