Water-to-Go - Replacement Filter Twin Pack
Two filters, 200 liters each, fits all bottles, $49.99
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The consumable that keeps every Water-to-Go bottle running: two filters, six months of rated use, $49.99.
Price: $49.99 · Verified: 2026-08-14
The consumable that keeps every Water-to-Go bottle running: two filters, six months of rated use, $49.99.
This twin pack is the single replacement part for the entire Water-to-Go bottle range. One cartridge design fits the 18.5 oz Small, the 26 oz Large, and the 1-liter Extra Large, so there is no size-matching or model-year guesswork when you reorder. Each filter is rated for 53 gallons (200 liters), which the brand frames as about three months of typical use, making the $49.99 pack a six-month supply.
The cartridge is the same filtration element the bottles ship with: Water-to-Go rates it at up to 99.999% removal of contaminants including viruses, bacteria, parasites, heavy metals, chemicals, pesticides, and microplastics. At rated capacity the twin pack works out to about 12.5 cents per liter, which is the number to compare against bottled water on a long trip.
Two usage caveats come straight from the product listing. Filtering sediment-heavy water reduces filter life below the 200-liter rating, so backcountry users pulling from silty sources should expect shorter cartridge lifespans and consider pre-settling murky water. And the filter is not effective on sea water, so it is not a coastal survival tool.
If you own any Water-to-Go bottle, this purchase is not optional, it is the operating cost. The practical question is cadence: at the rated three months per filter, a solo user needs two packs a year, roughly $100 annually. Buying a pack alongside the bottle also means a trip abroad does not depend on a resupply shipping window.
Existing Water-to-Go bottle owners stocking the standard six-month consumable before a trip.
You do not own a Water-to-Go bottle, or you need to treat sea water or heavy-sediment sources regularly.
Specifications
Where this fits
Water-to-Go Replacement Filter Twin Pack cross-shops across several editorial surfaces on this site: the full brand catalog and the in-depth guides for its category.
Water-to-Go Replacement Filter Twin Pack - buyer FAQ
How long does a Water-to-Go filter last?
Water-to-Go rates each filter at 3 months of use, or 200 litres (53 gallons), whichever comes first. The twin pack therefore covers roughly six months for one bottle. The brand notes that filtering sediment heavy water shortens filter life, and suggests swapping every 2 months in areas where the water supply is particularly unsafe.
Do you have to soak a new Water-to-Go filter before using it?
Yes. Water-to-Go says to fill the bottle so the filter is fully submerged and leave it for 15 minutes before the first drink. If a filter dries out between trips, the same 15 minute soak reactivates it, and the brand states you can safely reactivate a filter three times before it should be replaced.
Does the Water-to-Go twin pack fit all their bottles?
Yes. The twin pack is listed as fitting all Water-to-Go bottles, which covers the 18.5 oz, 26 oz and 33.8 oz sizes sold on the brand's US store. You get 2 filters in the pack, so one bottle is covered for about six months, or two bottles for about three months each.
What does the Water-to-Go filter actually remove?
Water-to-Go claims removal of up to 99.999% of contaminants, listing viruses, bacteria, parasites including giardia, heavy metals such as lead, arsenic and chromium, chemicals, pesticides and microplastics. The brand attributes this to three mechanisms working together: a very small pore size, a positive electrical charge, and activated carbon held loose inside the membrane.
Can you use a Water-to-Go filter with sea water?
No. The brand is explicit that the filter is for fresh water only and is not effective on sea water. Two other limits are worth knowing: the filter stops working properly if it freezes, and unopened filters keep for 3 years in their original packaging, so buying a twin pack ahead of a trip is fine.
Water-to-Go - Replacement Filter Twin Pack
$49.99 · Verified 2026-08-14
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