Lakes, streams, and even the run-down water fountain on the playground can seem like a tantalizing oasis when you’re thirsty. At least until you think about all the bacteria in freshwater, or see someone use the fountain to give their dog a bath. In your daily life, a portable water filter can save you from buying expensive re-branded tap water enclosed in plastic. On a hiking trip, top-grade filters can allow you to drink from a stream after all. Here are our top thirst-quenching choices.
