It’s only when you’ve been traveling for a while in countries with unsafe water that you truly appreciate being able to drink what comes out of the tap back home.

Sure, you can usually buy bottled water cheaply in those countries, but you’re not always sure where it came from. The environmental impact of plastic bottles is also hard to ignore when you see them washing up on the beach around you.

Water purifiers can give you the best of both worlds: clean, safe water on demand, without destroying the environment in the process. They’re a varied lot, though, and picking the wrong one can leave you with foul-tasting water and major stomach problems.

You’re looking for something that will kill bacteria, cysts, and viruses. It’s the last of those in particular that many devices won’t destroy.

At a minimum, you need something that won’t make the water taste worse than it already does. Ideally, it should also filter out particulates, chlorine, and metals so it tastes better.

Finally, it needs to be appropriate for travel — light, robust, and reliable, at a price that won’t break the bank.

There aren’t many that fit the bill, but luckily there are a few. Here are five water purifiers actually worth buying for travel.

Steripen Ultra

Steripen Ultra

Probably the most well-known portable water purifier, the various models of Steripen use a UV lamp to kill the bugs and bacteria. You just dunk the lamp into a cup or water bottle, stir for a minute or two, then drink. It’s a simple, inexpensive process, but it does have some limitations.

Firstly, it only purifies — there’s no filtering mechanism. This means you can’t use cloudy/dirty water with it, and while the treated version is unlikely to make you sick, it won’t taste any better than when you started.

The reliance on battery power also isn’t ideal, although at least this Ultra model charges via USB. Cheaper versions use hard-to-find disposable batteries.

While it’s good to be able to purify water in any vessel, I’d rather carry a bottle with a UV lamp built in. That way I could purify when necessary, and just use it as a normal water bottle the rest of the time.

Still, if the water you’re filtering is reasonably free of dirt and minerals to start with, the Steripen Ultra is a worthwhile, simple option.

Drinksafe Travel Tap

Drinksafe Travel Tap

There are several different models of purifier in the UK-made Drinksafe range, but my preference is the “Travel Tap” for one simple reason. As well as sucking water through the filtering/purification mechanism like the other models, you can also use the Travel Tap by gently squeezing the bottle.

This simple change greatly increases its usefulness, letting you do things like rinse your toothbrush and irrigate wounds with clean water.

I also like that you can remove the filter mechanism if you know the water is safe, meaning you don’t use it up unnecessarily. A lanyard and insulation sleeve are included in the package.

The Travel Tap has an 800ml capacity. It can purify up to 1600 litres of water before the auto-shutdown mechanism kicks in and the filter cartridge needs replacing. That’s pretty good — if you’re drinking two litres a day, it’s over two years of daily use.

Water flow is around 300ml/minute. That’s fine most of the time, but perhaps a little frustrating if you’re particularly thirsty.


Lifesaver bottle

The LifeSaver was originally developed to provide clean water to people in developing countries who wouldn’t otherwise have access to it, and it shows in the design.

It’s a simple piece of equipment that’s easy to use, reasonably robust, and lasts a long time without needing maintenance. That makes it equally useful for travelers as well.

It’s relatively heavy, at around 22oz (625g) when empty, so may not be for you if you’re an ultra-lightweight traveler. The purification cartridge lasts for an impressive 6000 liters before needing replacement.

You’ll need to replace the carbon filters more frequently, though. Depending on how dirty the water you’re using is, it’ll be roughly every 250 liters.

Filtering of the 750ml capacity takes under a minute, which compares favorably to many other approaches. The failsafe filter and cartridge mechanism won’t let you pump water after they’re used up, which is a much better approach than trying to remember how much water you’ve used, or using your stomach as a petrie dish to find out.

That the LifeSaver functions just like a normal water bottle is also very handy. It lets you tip the water into something else to let you rinse out a cut, cook or brush your teeth with it.

The GRAYL Ultralight Purifier Bottle

The Grayl

There’s plenty to like about the GRAYL. Rather than a straw or traditional pumping mechanism, this purifier works more like a coffee press. You fill the bottom part up with water, attach the top part and press down.

No more than 30 seconds later, you’ve got up to 16oz (a little under 500ml) of clean water in a stylish container. It’s super-simple and reliable, and the filter eliminates pretty much everything including viruses.

So what don’t I like? Well, a couple of things. The capacity is a bit low — at less than half a litre, you’ll get through it very quickly in hot countries. Of course, being able to fill it up again from almost anywhere negates that problem somewhat, but not entirely.

Secondly, it’s more expensive for lengthy trips than some of the other options. The filter costs around $25, and only treats 150 litres of water before it needs replacing — assuming you can find one wherever you happen to be, of course. Take an extra filter from home if you’re likely to need one.

Overall, though, the GRAYL is a good choice, especially for shorter trips.

Survivor Filter Pro

Survivor Filter Pro

While it’s really aimed more at hikers and back-country campers, the Survivor Filter Pro works well for travelers as well. At just over 8oz it’s a lightweight option, and a manageable 3.2″ x 2.0″ x 6.5″ in size.

The Filter Pro has three-stage filtration, with the carbon filter capable of handling 2000 liters before needing replacement, and the other two filters handling up to a huge 100,000 liters.

You can push up to 17oz (500ml) of water a minute through the Filter Pro, which is more than fine when traveling as a couple or individual — you can filter a litre or two of water in a few minutes before heading out for the day.

The company touts the efficiency of its 0.1-micron filters, particularly for dealing with heavy metals that most other systems can’t touch.

Reasonably priced and with an easy-to-use pumping mechanism, the only minor flaw for travelers is the tube-based intake mechanism.

It works very well for filling from rivers and lakes, but can be a bit fiddly to use from a tap. Still, there’s always the sink!

These Are the 5 Best Water Purifiers for Travel