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SteriPEN: By Far The Best Invention for Modern Travel

by Globetrooper Todd | 10 Responses

From toilet roll holders for tents, to packing cubes that organise luggage, most travel products are just gimmicks. In fact, I make it a point to only travel with items I’d use at home. The road is my home, so it only makes sense. But there’s one exception.

The SteriPEN is by far the most useful travel product on the planet. Before mine was stolen, it was the only travel-specific product I carried. It had saved me many times, from the pasty mouth of dehydration to the deathly grip of travel sickness. If you ever travel into back-country or to developing countries, it’s a must-have piece of kit.

What on Earth is a Steripen?

SteriPEN products are ultraviolet light water purification devices. No more bottled water, no more boiling water; you just turn it on, shake it around in your water, and it kills 99.9% of bacteria, viruses and other nasty stuff.

It’s not new technology either; cities and bottled water companies have used it for decades to purify the water that millions of people drink. But SteriPEN was the first company to bring it to the global travel scene to help Globetroopers alike avoid travel sickness on the road.

A SteriPEN device is generally battery-operated (there’s also hand-powered and solar-recharging versions) and small enough to carry in a purse or small bag. It contains a glass tip, which you insert into the water for a predetermined period. Indicator lights confirm whether your water is safe to slurp.

Important Points About SteriPEN

  • Use on water only: no fruit juice, no milkshakes, no Mongolian sheep-eyeball stew
  • Murky water should be filtered: sediment can disrupt the light and purification process
  • Treated water tastes fine: unlike treatment pills, SteriPEN doesn’t cause funky tastes
  • No salt or ice: I’ve previously written in-depth about the hazards of drinking salt water

As long as you remember that you should only use the SteriPEN on clear water, then you shouldn’t have any problems. Even if you’re in the back-country and only have access to murky water, you can filter it through a piece of clothing or use the SteriPEN Pre-filter (which is a separate accessory).

SteriPEN Models

SteriPEN Classic

SteriPEN Classic

SteriPEN build products for military, government and emergency situations, but most of you will be interested in their adventure and travel series. With that said, they have a very interesting hand-powered product, called the Sidewinder, that doesn’t use batteries. It would be perfect for backup on serious expeditions that risk losing all power.

Nonetheless, here are the most popular models. You’ll be especially surprised by the prices. Even though they use enterprise-grade technology and are quite literally life-saving devices, all can be bought for less than $100!


  • Mates with SteriPEN Pre-Filter and commercial water bottles (e.g. Nalgene)
  • Lamp life of 8000 treatments
  • Standard battery life of 100 x 1litre treatments
  • Weighs 162 grams
  • RRP $79.95
SteriPEN Adventure Optie

SteriPEN Adventure Opti


  • Lamp life of 8000 treatments
  • Standard battery life of 50 x 1litre treatments
  • Weighs 105 grams
  • RRP $99.95

Adventurer Opti

  • Uses a new optical light to detect water, which can be used as a flashlight too
  • Lamp life of 8000 treatments
  • Standard battery life of 50 x 1litre treatments
  • Weighs 103 grams
  • RRP $99.95
  • Also available with a solar-powered re-charging case for $149.95
  • The solar case protects the device and takes 20 hours to fully charge
SteriPEN Journey with LCD

SteriPEN Journey with LCD


  • LCD timer and battery/lamp status
  • Mates with SteriPEN Pre-Filter and commercial water bottles (e.g. Nalgene)
  • Lamp life of 8000 treatments
  • Standard battery life of 50 x 1litre treatments
  • Weighs 128 grams
  • RRP $99.95


  • Mates with SteriPEN Pre-Filter and commercial water bottles (e.g. Nalgene)
  • Lamp life of 3000 treatments
  • Standard battery life of 100 x 1litre treatments
  • Weighs 162 grams
  • RRP $49.95

Traveler Mini

  • Lamp life of 3000 treatments
  • Standard battery life of 50 x 1litre treatments
  • Weighs 103 grams
  • RRP $69.95

Using the SteriPEN

Usage depends on the model, but generally, you submerge the glass lamp, press the button once or twice (depending on if you’re purifying 1 litre or half a litre), and stir the water with the ‘PEN’ until the indicator suggests it’s ready.

There’s nothing stopping you from doing it twice if you’re particularly worried about purity and you can take comfort in the fact that the SteriPEN has safeguards to ensure you know if the treatment has completed successfully. You may also choose to treat sealed bottle-water if you’re uncertain of its purity; remember, not all spring water comes from a perfectly pure spring, and in some countries street vendors just bottle tap water to earn better margins.

Our Experience with SteriPEN

We previously owned the Traveler, which is the base model and very sturdy, reliable and easy to use. My only gripe, apart from it being stolen, was that it was a little too large. I’ve written previously about travelling with carry-on luggage only, and so I only carry a 32 litre Deuter backpack. I hope that puts it in perspective, because it’s not large at all, but without much real estate in my pack, I like to keep everything lightweight.

SteriPEN Adventure Opti with Solar Case

SteriPEN Adventure Opti with Solar Case

Gobi 2011 – The SteriPEN Proving Ground

That brings me to Lauren’s Mongolian desert expedition, Gobi 2011. As most of you know, she’s walking 1,600km (1000 miles) across Mongolia’s Gobi desert with an expedition team of 12 others. Apart from the poles, Mongolia is one of the most remote places on the planet, where water isn’t sold by the bottle on every corner.

Upgrading to the Adventure Opti with Solar

For the expedition, SteriPEN have kindly sponsored Lauren with the SteriPEN Adventure Opti with solar-powered case.

Disposable batteries will be even less common than fresh water in the desert, so the solar-powered case will be very handy. And keep in mind, even though it takes 20 hours to recharge the SteriPEN, it may only need charging once every few weeks, even with the impossible demands of expedition desert travel.

Also, the Adventure Opti is teeny tiny compared to the Traveler, at only 103 grams, so it gets my carry-on friendly tick of approval.

What Does the SteriPEN kill?

  • All Bacteria: such as Cholera, Campylobacter, E. Coli, Legionella, Salmonella, etc.
  • All Viruses: such as Hepatitis A, B, C, D ,etc.
  • All Protozoan Parasites: such as Cryptosporidium, Giardia, etc.

When Doesn’t the SteriPEN Kill?

  • The SteriPEN does not treat poisonous chemicals; so don’t treat water if you suspect chemical runoff or any toxicity in the surrounding areas (e.g. it won’t neutralize radioactive water in Japan)
  • It may not destroy eggs of worms and insects; SteriPEN is yet to conduct this research
Posted in Gear & Gadgets | April 16th, 2011

10 Responses to SteriPEN: By Far The Best Invention for Modern Travel

  1. Enjoyed the read.

  2. It’s certainly up there but I’d say the best invention of modern travel is quite simply the compass.
    Just my penny worth!

  3. Have not tried this product yet, but I do see one potential problem: If you fill your bottle directly from a water source, seems like you risk contaminating parts of the bottle that the pen wouldn’t reach (e.g. water on the rim and threads of the bottle). To be safe, seems like you’d need a separate bottle to scoop up the water and then pour into the bottle being sterilized. Or does SteriPen have some mechanism to avoid this problem?

    • Good point Mike. No, there’s no way the SteriPEN avoids the problem, but they suggest you wipe the thread of the mouthpiece or wash it with the treated water. With the pre-filter attachment, you can turn the bottle upside down so it’s just the thread that’s not treated, which you can wipe with a cloth.

      That said, even though I’ve thought of this issue a few times, it’s never been while treating water, so I’ve never really wiped the thread. But hopefully I will no after writing this. Tap water is one thing, but funky stagnant water out in the wilderness could cause some trouble.

    • Mike, I agree that’s an issue with some of the smaller Steripens. I use the Steripen Classic, doing exactly what Todd said – use the prefilter placed on a nalgene bottle, and invert it after you insert the Steripen and swirl the water, so the entire interior of the bottle is sterilized. The Steripen classic is designed to make a seal when you insert in thru the pre-filter. This works well, I’ve never had a problem.

  4. Hey guys!

    If you like the SteriPen, then you should also check out this Australian invention!

    Looks very sophisticated to me!

  5. I’ve just tried my classic Steripen for the first time with water from a rainwater butt, and it didn’t kill the water fleas (Daphnia sp.) that were in it.
    So just did a web search, finding this, to see what animals the Steripen won’t kill. I’m confused! As everything I read indicates it should kill these things.
    The experiment, very basic, was my 500 ml bottle of rainwater with tiny, yet visible, swimming water fleas darting around. Pressed the button twice for 500 ml, and everything seemed to work correctly, with the green light indicating that all went correctly after it had completed.
    I could see the insects still moving, I had stirred the water up a lot during the process, and so I used a magnifier to see if they were still alive and not just the water moving them. They were all very much alive. So then I tried using the Steripen for a second attempt in the same water. Still the animals were alive.
    I now don’t know what to think, I know UV works, so this should work, but just what does it kill and not kill?

  6. One thing about the steri-pen that is the biggest drawback for me. It’s electronic. If something goes wrong with it you are out of luck. Yes, carry some tablets just in case, but that almost defeats the purpose. I’ve used a couple different models in backcountry settings and have been impressed by none of them. How do you replace batteries in a 3rd world country when they run out, especially when those batteries are weird sizes.

    I use the lifestraw, even though it does not filter out viruses it is the most portable and easy to use/care for filter on the market.

  7. Ein toller Fellsattel zeichnet sich vor allem dadurch aus, dass er ebenso toll für den Gaul und für den Reitenden sein kann. Dieser Faktor sollte vorrangig der ausschlaggebende Punkt während dem Kauf des Fellsattels sein. Nun kann man ins Detail einsteigen und genaue Merkmale der verschiedenen Varianten ins Auge fassen. Selbstverständlich spielt auch hier das Alter eine entscheidende Rolle. Für Kinder eignen sich speziell rutschsichere Sattel. Bei Großen dürfte dieser Punkt nahezu missachtet werden. Genauso ausschlaggebend ist außerdem der Komfort des Fellsattels. Jetzt bietet sich v.a. Lammfell an. Dieser Stoff bzw. das Material ist ausgesprochen weich und gleichzeitig schonend für das Pferd. Ein Fellsattel aus Lammfell ist mit großer Wahrscheinlichkeit die erste Alternative die ein Pferdeliebhaber haben dürfte. Jedoch ist ein solcher Sattel unter anderem im Preis enorm höher als andere.

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