This is incredible. I ran past a couple of posts about this and decided to research it and do a post myself. I found details of this product on eartheasy.com . This is a filter straw that weighs only 2oz and works against virtually all waterborn bacteria and protozoa, removing 99.9% of protozoa and 99.9999% of bacteria. It has a 5 year shelf life and filters up to 1,000 liters of water. This is something that all households should have in their emergency kit. You can purchase it on eartheasy.com for only $19.95. Here are some photos that I found on the site as well.