RapidPure Purifier UltraLight Straw Perfect for weekend hikes, global adventures, or everyday use, the RapidPure Purifier UltraLight Straw gives you the power to filter and purify water as you drink. Adventure Medicals lightest purifier, this pocket-sized straw weighs less than 3oz, features a protective cap for the mouthpiece, and comes with a carrying bag. Simplified water purification with the POD system and UltraCeram purification technology. Unlike microfilters that rely on small pore siz