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Drop-in purification lets any vessel become a self-contained water-cleansing system. No matter who you are—or what mountaintop, elliptical machine, or TPS report you need to conquer—crisp, fresh-tasting H2O can go right along with you. Just fill any of these fine flagons at the nearest tap, and drink up.
This article was originally published in the March/April 2017 issue of Popular Science, under the title “Carry Water.”