Treating your mains water supply is a great way to encourage a more positive, wellness lifestyle, but what about when you’re outside of the home? Most of us spend at least some portion of the week in an office, education space, or simply out and about (at least, beyond COVID lockdowns). So why not carry over those filtering benefits to the rest of your weekly routine, with the addition of a filtered water bottle?

Filter water bottles give you peace of mind that all of the water you’re drinking is of good quality, while also lessening your environmental impact and plastic consumption. Here’s our list of the best filtered water bottles available now:

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How do filtered water bottles work?

  • Most of the filters you’ll find in a portable water bottle work via activated charcoal cartridges. This is material with a high carbon purity that’s been ground-up and packed into a structure that maximizes surface area. When water runs through the filter, organic carbon-containing compounds such as chlorine and run-off from heavy industry are adsorbed to the charcoal’s surface, leaving you with purer, better-tasting H2O.

  • Other filtered water bottles intended to handle more extreme water sources may use their own, bespoke filtration designs. Many of these utilize ‘squeeze’ mechanisms, requiring the user to manually push water through a series of porous materials. These designs, with the extra manual pressure, often allows devices to gain NSF Standard 53 certifications. This means they’re capable of taking out potentially harmful contaminants found in untreated water sources, such as bacteria and protozoa.

  • Aside from the technical aspects of filtered water bottles, the wider principle of compact filtering devices is to make water treatment as portable as possible, thereby encouraging more use. Instead of needing to head to the kitchen, refrigerator, or work station multiple times per day, a water bottle ensures you always have a steady supply of filtered water, ready to sip.

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Why are filtered water bottles a good idea?

Public infrastructure

With the water treatment industry focusing on home filter solutions, it can be easy to neglect the fact that many public institutions use tired or outdated infrastructure, which may be a better candidate for filtering than the plumbing in your home.

Schools are a frequent offender here. With children spending at least half their day in the classroom, the benefits of a home filtering can be easily outweighed by an inadequate water fountain. For example, a 2019 Canadian study found unsafe levels of lead in a worrying number of school and daycare settings.

Likewise, many of us spend large portions of our day in offices, commercial buildings, and other public spaces—most of which have uncertain or unclear water treatment policies. Carrying a filtered water bottle allows you to transfer good drinking practices from the home out into the world, giving you the confidence to drink from a wider array of sources.

Daytrips, hikes, and travel

Sometimes a filtered water bottle is more of a necessity than a luxury. In areas where the safety of water can’t be assured—be it a campsite, foreign city, or places with old plumbing infrastructure—carrying a portable filter bottle can mean there’s no need to resort to more intensive sanitation methods such as boiling or chemical treatment.

Good habits = positive effects

Knowing that you always have access to good quality drinking water is a great way to encourage better drinking habits. Because filtering water is an active, physical action (even if it’s simply filling the bottle and letting the filter do its thing), it fits into the category of activities most likely to bring about long-term habit formation and boosts general wellbeing.

The benefits aren’t just personal, however. Filtered water bottles are an environmentally sound solution to portable water—in more than one way. A reusable bottle will significantly reduce your consumption of single-use plastics, while also doing away with the need to introduce chemicals such as iodine or chlorine into sensitive or highly trafficked environments such as backcountry and wilderness areas.

FAQs

Essentially, yes. Unless a product makes a specific filtering claim, there won’t be too much difference between your average filter water bottle and your average Brita pitcher or faucet-mounted device.

Of course, more intensive home filters, such as those that employ reverse osmosis or distillation, may offer a superior level of contamination removal. Likewise, bottles designed for expedition usage will focus on the most common health hazards found in untreated water.

A filter water bottle cannot replace traditional water treatment methods such as boiling or chemical purification—but they’re also not designed to. Whereas iodine or a three-minute boil should remove all nasty impurities from a water source, including viruses, a filter bottle will only handle microorganisms down to certain micron sizes.

However, that size is usually calibrated to handle the main water concerns for a specific region. In the U.S. and Canada, this includes bacteria like E. coli and salmonella, and protozoa such as Cryptosporidium and Giardia. If you are planning to use a filter water bottle to turn unsafe water sources into drinking water, always be sure to confirm that a device’s exact specifications are what you really need.

Yes! While the filtering power of bottles may differ across products and brands, all filter water bottles are concerned with producing purer, more drinkable water. As a result, these products encourage more frequent water consumption (with the added bonus on contaminant removal) which can only be good news for your overall health.