Until recently, when we went back-country camping, we'd bring a lightweight camp stove. That meant safe water from streams, hot meals, and an unlimited supply of the best Kona coffee... ever. (We also brought a Melitta coffee filter cone.)
These days, when we back-country camp, we carry a very effective ultraviolet water sterilizer, which lets us save on weight by leaving the camping stove and accompanying paraphernalia at home.
No Kona coffee, no hot meals. Oh well.
You'll notice another item in the picture: a bottle of iodine pills to be used if the primary mechanism for sterilizing water fails. We've carried that same bottle for 25 years, but, mercifully have never had to use it. The shelf life of those pills exceeds my expiration date.