Turn any water into safe drinking water with the Roving Blue® O-Pen™ Portable Water Purification System. More powerful than chlorine, this handy device infuses water with tiny bubbles of ozone gas, making it safe to drink. Approved by the FDA and the USDA, ozone is highly effective against dangerous microorganisms. Once it finishes, ozone quickly reverts to oxygen, leaving no chemical tastes, odors or residue. Featuring advanced technology, the device has a black metal cartridge housing. Furthermore, the Roving Blue® O-Pen™ purifies 16 ounces of water in less than a minute. Weighing only 1.2 ounces, the portable water purification system is easy to bring with you anywhere. TSA approved to carry onboard, Roving Blue® O-Pen™ ensures that you can drink safe water during your travels.