The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Choose a water-treatment method for the germs and conditions you may encounter—not just because a product is called a “filter” or “purifier.” For a portable filter, check the exact model’s pore-size or cyst-reduction claim: CDC guidance says an absolute pore size of 1 micron or smaller, or NSF 53 or 58 certification for cyst reduction or removal, removes parasites. An absolute pore size of 0.3 micron or smaller also removes bacteria, but not viruses. Most portable filters do not remove viruses.
Start with the source and the risk
Clear-looking stream or lake water can still contain germs. Treat uncertain water before drinking it, using it to cook, brushing your teeth, or preparing food. The right method depends on which germs you need to address, how cloudy the water is, how much you need, and whether you have heat or treatment supplies available.
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These methods address biological contamination, not every kind of hazard. Water suspected of containing fuel, toxic chemicals, or radioactive material should not be treated as safe by filtering, boiling, or disinfecting; use bottled water or another source and follow local health advice.
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What the filter label needs to establish
For a portable filter, look for a specific, verifiable claim on the exact model’s label or authoritative product documentation. CDC guidance says a filter with an absolute pore size of 1 micron or smaller, or NSF 53 or 58 certification for cyst reduction or removal, removes parasites. A filter with an absolute pore size of 0.3 micron or smaller removes bacteria as well as parasites. These thresholds do not mean the filter removes viruses.
#1 Best Overall
- Removes Bacteria & Parasites: The Microfiltration Membrane Removes 99.999999% of Waterborne Bacteria (Including E. Coli and Salmonella), and 99.999% of Waterborne Parasites (Including Giardia and Cryptosporidium) - Essential for Your Survival Kit
- Removes Microplastics: Removes the Smallest Microplastics Found in the Environment (Down to 1 Micron), and Reduces Turbidity Down to 0.2 Microns - Ideal for Hiking and Camping Essentials
- Rigorous Testing: All Claims Are Verified with Laboratories Using Standard Testing Protocols Set by the US EPA, NSF, ASTM for Water Purifiers
- Long Lifetime: The Microbiological Purification System Will Provide 4,000 Liters (1,000 Gallons) of Clean and Safe Drinking Water - a Must-Have for Your Bug Out Bag
- Make an Impact: For Every LifeStraw Product Purchased, a School Child in Need Receives Safe Drinking Water for an Entire School Year. Essential Camping Accessory Made With BPA Free Materials
Do not treat “filter” or “purifier” as a universal performance guarantee. If virus protection matters for the water source, plan to boil or disinfect after filtering, or use another treatment method documented to cover viruses. CDC describes filtering and then disinfecting as a practical option when boiling is unavailable; disinfectant effectiveness varies by organism and product, so follow the label’s dose and contact time. Some disinfectants are less effective against parasites. Chlorine dioxide has some effectiveness against Cryptosporidium, but CDC describes filtering first as the safest approach.
Choose a treatment method that fits the conditions
| Method | What it can address | Important conditions |
|---|---|---|
| Portable filter | Parasites when the model meets the cited pore-size or cyst-certification criteria; bacteria when its absolute pore size is 0.3 micron or smaller. | Most portable filters do not remove viruses. Verify the exact model’s claim. |
| Filter, then disinfect | Filtering removes particles and relevant parasites; disinfection can address viruses and bacteria, depending on the method and organism. | Some disinfectants are less effective against parasites. Follow product directions and contact times. |
| Boiling | CDC calls boiling the best way to kill germs. | For clear water, bring it to a rolling boil for 1 minute, or 3 minutes above 6,500 feet. Let it cool safely; settle or pre-filter cloudy water first. |
| Portable UV | Can kill parasites, bacteria, and viruses in small amounts of clear water. | Cloudiness and particles can block germs from UV light, so filter cloudy water first. |
Build a hiking or camping kit around a real backup
For trail use, choose a portable water filter only after confirming its specific coverage claim. If viruses are a plausible concern, carry a suitable disinfection option as well, or plan to boil water. When using a chemical disinfectant, follow the product’s directions rather than assuming that all products work equally well against every organism.
Rank #2
- CLEAN WATER ANYWHERE: Our water filter straws solve the real challenge of being on the move, finding water is rarely the problem, finding water that's safe to drink is. Each filter removes over 99.99% of waterborne bacteria and parasites so you stay properly hydrated and in the best shape possible
- LIGHTWEIGHT & PORTABLE: Our filters weigh only 2 oz and measure 8 inches long, so you can take them with you anywhere. Be prepared when camping, hiking, enjoying the outdoors, or when facing unexpected situations such as natural disasters, accidents, or just about anything
- HIGH LEVEL FILTRATION: Each of the 5 filters removes over 99.99% of waterborne bacteria (such as E. coli and Legionella) and over 99.99% of waterborne parasites (such as Giardia and Cryptosporidium), including the smallest microplastics found in the environment, down to 0.1 micron
- LASTS UP TO 10 YEARS: Each filter reaches up to 1800 gallons, providing up to 10 years of drinking water for the average person. Built BPA-free, FDA-compliant, manufactured under rigorous quality control standards and tested regularly for performance, individually sealed with its own backflushing plunger
- EMERGENCY PREPAREDNESS: Keep this lightweight filter when backpacking, fishing, hiking, camping, hunting, or exploring the wilderness. Perfect for power outages, hurricanes, earthquakes, floods, and storms. Keep a set in your car or bugout bag, so you're always prepared wherever life takes you
Plan for cloudy water: particles can interfere with UV treatment, and CDC advises settling or pre-filtering cloudy water before boiling. Consider how much water you need and whether your chosen method requires fuel, heat, or consumables. The CDC guidance cited here does not compare individual models’ weight, flow rate, service life, freezing tolerance, replacement availability, or cost; check current manufacturer documentation for those details.
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After a disaster, CDC advises using bottled, boiled, or treated water and following health-department recommendations. A portable filter can be one part of an emergency water plan, but it cannot make water with fuel, toxic chemicals, or radioactive materials safe. Keep an alternative source or bottled water in mind when contamination of that kind is possible.
Rank #3
- Drink Anywhere, Certified by Science - This survival-grade straw filter meets strict NSF/ANSI 42, 372, 401 standards (Test Report: NBF21-004693-01). It instantly removes 99.9999% of total coliforms (including E. coli and other representative organisms). It’s designed for extreme reliability during hiking, camping, international travel, or emergency preparedness—proven by science, trusted by adventurers.
- Triple NSF Certified for Complete Reliability & Superior Taste - Breathe easy with every sip. Our straw is independently certified to NSF/42 (for chlorine & taste improvement), NSF/372 (lead-free materials), and NSF/401 (reducing microplastics and particulate). This triple verification guarantees you get the best-tasting water while keeping metals, microplastics and particulate at bay.
- Portable & Long Life-Span - This straw filtration at only 7.1'' long and 1" in diameter fits any 28mm threaded bottle, cup, or glass. It weighs just 2 ounces and fits in the palm of your hand, pocket, gym bag, backpack, survival pack or purse. Both ends of the Upgrade water filter straw are removable for extend Longer Lifespan ensuring it provides up to 1,320 gallons (5,000 liters) of drinking water. Don't miss this opportunity to drink water conveniently wherever you go.
- 5-Stage Filtration - Our Upgrade 5-Stage Filtration System includes a coarse filter screen, double layer pp cotton fiber, coconut shell activated carbon and hollow fiber ultrafiltration membranes. Flexible use of threaded water inlet cap to easy backflush. (IT DOES NOT LOWER TDS VALUE, ensuring water's essential mineral balance remains untouched.)
- 0.1 Micron Pore Size & Balanced Flow Rate - This water filter straw features a 0.1 micron pore size, designed to help improve filtration precision. It delivers a flow rate of up to 16.9 fl oz/min (500 ml/min) for a balance between filtration performance and drinking speed, making it suitable for outdoor, travel, and emergency use.
For emergency boiling, bring clear water to a rolling boil for 1 minute, or 3 minutes above 6,500 feet, then let it cool safely. CDC’s emergency guidance also stresses that boiling or disinfecting cannot make water containing fuel, toxic chemicals, or radioactive materials safe: How to Make Water Safe in an Emergency.
Quick Recap
Best Value
- LifeStraw Go Series is the ULTIMATE SIDEKICK. The BPA-Free bottle filters out nasties so you can fill up from airport bathrooms, a tap in Mexico, or a gas station while road-tripping
- IMPROVES TASTE: the Carbon filter reduces chlorine, odors + organic chemical matter
- FILTERS OUT CONTAMINANTS: the Membrane microfilter protects against 99.999999% Bacteria (including E.coli + Salmonella), 99.999% Parasites (including Giardia and Cryptosporidium), 99.999% Microplastics, sand, dirt, and cloudiness
- LONG LASTING: The membrane microfilter lasts up to 1,000 gal (4,000 L) - about five years of daily use. Carbon filter lasts up to 26 gallons (100 L) - about two months
- SAVES WASTE: The membrane microfilter lasts up to 4,000 liters. That’s 8,000 single use plastic water bottles out of our parks, our oceans, and our communities
Rank #4
- Ideal for outdoor recreation, hiking, camping, scouting, domestic or international travel, and emergency preparedness
- High-performance 0.1 micron absolute inline filter fits in the palm of your hand and weighs just 2 ounces; 100% of MINI units individually tested three times to performance standards by Sawyer
- Attaches to included drinking pouch, standard 28 mm disposable water bottles, hydration packs, or use the straw to drink directly from your water source
- Removes 99.99999% of all bacteria (Salmonella, Cholera, and E. coli); removes 99.9999% of all protozoa (such as Giardia and Cryptosporidium); also removes 100% of microplastics
- Filter rated up to 100,000 gallons; Includes one Sawyer MINI filter, 16-ounce reusable squeeze pouch, 7-inch drinking straw, and cleaning plunger.
CDC guidance
- About Water Treatment Options When Hiking, Camping, or Traveling (CDC, January 30, 2025).
- How to Make Water Safe in an Emergency (CDC, September 19, 2024).
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
