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1. O-Pen® Pocket Water Purifier

Product #: O-Pen TB
$149.00 USD
Price is only valid in the US. Please contact us at prior to placing an international order.
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 drink from that cold mountain stream, you can rely on the Roving Blue O-Pen® to ensure that the water is safer to drink.

Our patent-pending O-Pen® Ozone 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 worldwide, 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:

How it is used: 

Users will collect clear water in a cup or water bottle, remove the metal pen cap, press the On/Off button to activate the ozone cycle, and watch while ozone is dissolved into the water. This takes about :40 seconds. At the end of the treatment cycle, the water may be used immediately (to clean other things), or you can wait 3 minutes to allow the ozone to treat the water itself.  The pen can be used approximately 40 times before the internal battery (included) needs to be re-charged, which is done like a cell phone, via a usb cord.  The pen will last for thousands of uses. There are no additional chemicals needed, and no chemicals are left behind.

A Partial List of Bacteria, Protozoa and Viruses that can be in drinking water, (and that Ozone Can Destroy): (For the full list, download this document by the EPA.





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 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™".

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 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.

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)

Ask us about special pricing for Charitable Organizations.
Reddy Yeti Unboxing Video about O-Pen
Check out the "Unboxing" of the O-Pen by the folks at Reddy Yeti

Also, here is How to use your new O-Pen (Gen 4 introduced in late 2022) if you are not the type to actually read instructions.

Here is a link to the printable user manual.