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The original, award-winning ultralight personal “straw” filter for outdoor sports, survival and emergencies. Removes bacteria, parasites and microplastics. Durable and ultralight: weighs only 2 ounces (0.10 lbs). Long-lasting: filters 1,000 gallons (4,000 liters), enough drinking water for an individual for over 5 years. Ultimate survival tool, no shelf life, easy to clean and store, used and tested all over the globe. This product gives back: One product, one school child, one year of clean water.