Water Filter Straw, Frontier Emergency Water Filter System for Emergency Disaster Preparedness, Survival Kits, Survival Packs, Survival Gear, Camping, Ultra light and compact, the Aquamira Frontier Emergency Filter System weighs less than one ounce and easily slips into a day pack, shirt pocket or travel luggage and is always ready when you need it. The Frontier Filter is the ideal alternative to heavy, bulky and expensive pump filtration units when space and weight are primary factors. Activated carbon helps reduce waterborne chemicals and improves water taste. Use the Frontier Emergency Water Filter System to drink from any bottle, cup or directly from water sources.