McNett Corporation Water Purifier Tablets 159281 gives you clean, portable water anywhere! Water Purifier Tablets from McNett is a must have for your next outdoors trip. These McNett Purifier Tablets kill bacteria, viruses, giardia & cryptosporidium. The McNett Aquamira Water Purification Tablets contain a unique chlorine dioxide formula that produces a powerful germicidal agent when released in water. To use, simply drop 1 tablet in 1 liter of water and wait the required amount of time. These water purifier tablets are lightweight and compact which makes them perfect for hiking, backpacking, camping, travel and emergency preparedness kits.