About Roving Blue Roving Blue is proud to be building advanced, portable water purification systems that harness “The Power of EO3”, electrolytic ozone, for use around the world. EO3 is the most advanced way to make aqueous ozone, a disinfectant that is more powerful than chlorine, yet quickly reverts to oxygen. Roving Blue, based in Wisconsin, USA, has been building and selling these devices since 2014. Roving Blue O-Pen Portable Ozone Water Purification You Thirst for Adventure. Quench it Safely with the O-Pen 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. Ozone is highly effective against dangerous microorganisms. Once it finishes, ozone quickly reverts to oxygen, leaving no chemical tastes, odors or residue. You can rely on the Roving Blue O-Pen to ensure that the water is safer to drink! Ozone Water Purifier Water Purification System for Survival Fast Acting Safe and Effective Rechargeable Drinking cool river water from your cupped hands, after a long hike in the sun, may seem like a great idea at the time. However, you can’t say for sure whether your next sip is safe from pollutants or disease, so best to ensure that you treat each drop with caution. A study found that one in eight airplanes nationwide do not meet their standards for water safety, and that 12 percent of commercial planes tested positive for fecal bacteria in the tap water supply. Testing samples of ice served in the beverages of major restaurant chains, lab studies confirmed that six in 10 contained higher levels of bacteria than that of what's found in a toilet bowl. A study found that drinking water from nearly half of restaurant soda fountains was not only riddled with bacteria, but also mold.