Home of the O-Pen®

  • Ozone, roving Blue, water purification

You thirst for adventure. Quench it safely with the O-Pen®.

Whether your adventures bring you to a quaint sidewalk restaurant in a foreign land, or you just want to quench your thirst from a cold mountain stream, you can rely on the Roving Blue O-Pen® to ensure that the water is safe to drink.

Want to test drive the O-Pen® before you buy? 

Contact us at sales@rovingblue.com  for details about our Rental Program with easy payments of $19.99 including free shipping for both delivery and return!

The O-Pen® is the latest advancement in pocket water purifiers. It makes water safer by infusing it with a cloud of ozone gas.  Used by water treatment plants and water bottlers world-wide, ozone is the strongest oxidizer available that can be safely used in water treatment 1

  • In 1997, the FDA approved the use of ozone as an anti-microbial agent with indirect contact with foods.
  • In 2002, the FDA approved ozone for use on food contact areas and directly on food with its “Generally Regarded as Safe” (GRAS) designation.
  • Today, the Organic Foods Production Act (OFPA) identifies aqueous ozone (ozone dissolved in water) as a substance that is allowed for use in organic crop and livestock production.

The Roving Blue O-Pen® utilizes “The Power of EO3™”, electrolytic ozone, more powerful than chlorine, and is highly effective against multiple dangerous organisms, bacteria, viruses and cysts:

Partial List of Micro-organisms that Ozone Can Destroy:

Bacillus anthracis (Anthrax)





Poliovirus (Poliomyelitis)

 Salmonella paratyphi (Enteric Fever)

Streptococcus faecalis

Bacteriophage (E. Coli)

Dysentery bacilli (Diarrhea)


Legionella pneumophilia (Legionnaires’ Disease)

Salmonella (food poisoning)

Salmonella typhosa (Typhoid Fever)


Additionally, there is no chance these organisms can develop a resistance to ozone. Best of all, when its job is done, ozone reverts to oxygen quickly, leaving no chemical residue, odors or tastes. 100% legal and permitted to bring on board with all the airlines with you hand-carried, not checked luggage (due to the internal lithium battery), you can be sure that the tap water in your hotel room, cruise ship cabin, or nearby stream, is safe to drink, because with the O-Pen®, the World is Your Water Bottle™”.

 1. Water Quality Association, “Ozone for POU, POE and Small Water System Water Treatment Applications,” Lisle, IL 1999

Advanced Technology

The O-Pen® is an advanced device housed in a black metal cartridge.

It will purify .5 L or 16 oz. of water in under one minute.

Ultra Portable
The O-Pen® weighs only 1.2 oz. (30 g).

No Waste
Rechargeable battery w/ USB cable included. Purifies approximately 25+ liters per charge (about 50 uses)

You CAN drink the water!

Limitless Clean Water Supply Courtesy of the O-Pen™ Dipped in Lake Superior

Ozone also removes unpleasant tastes and odors – you won’t be able to tell the difference between your glass of tap water and bottled water.

The O-Pen®’s ozone generator plates have an expected life expectancy of 2,000 hours. Each use is less than a minute.= thousands of uses.

We are proud to be building advanced, portable water purification systems that harness “The Power of EO3™”, electrolytic ozone, for use around the world.

EPA Est. 094576-TWN-001

The O-Pen® is not currently available for purchase in the following states: CO, DC, HI, IN, NV, OK, WY

Click here to download Backpacker Magazine’s Field Test Review of the O-Pen®

Click here to download the Roving Blue O-Pen™ Tactical Black Sell Sheet

Click here to download the Roving Blue O-Pen™ User Manual

Click here to download the Roving Blue O-Pen™ Warranty

Read Independent Laboratory Tests on the O-Pen® and How it Kills: