GeoPress® Replacement Purifier Cartridge
The Grayl GeoPress® Replacement Purifier Cartridge provides powerful, fast, and reliable filtration and purification for international travel, remote deployments, and survival operations. Designed to neutralize threats in suspect water sources—from hotel taps in less developed regions to silty streams in austere environments—it ensures your team stays hydrated and protected across every mission.
"A prudent person foresees danger ahead and takes precautions. The simpleton goes blindly on and suffers the consequences. - Proverbs 27:12"
Proven Global Protection
Removes 99.99% of viruses, 99.9999% of bacteria, and 99.9% of protozoan cysts including Rotavirus, Hepatitis A, Norovirus, E. coli, Giardia, and Cryptosporidium.
Advanced Contaminant Removal
Filters sediment and microplastics, and adsorbs heavy metals, PFAS, VOCs, pesticides, herbicides, and unpleasant tastes or odors using ultra-powdered activated carbon.
Fast Press Time
Produces 24 oz of clean water in just 8 seconds (5L/min flow rate), even in challenging environments.
One-Way Valve Compatible
Allows safe use with electrolyte drink mixes, critical for rehydration in hot climates or operational deployments.
Rugged & Reliable
Each cartridge is rated for 350 presses (65 gal / 250L) and continues to function safely as press time increases, with a 10-year shelf life when stored properly.
Remove the used cartridge by unscrewing it counterclockwise from the GeoPress Inner Press.
Install the new cartridge by aligning and rotating clockwise until fully locked in place.
Press as normal to produce purified drinking water.
If using drink mixes, insert One-Way Valve prior to use.
The numbers, flat and honest.
| Compatibility | Fits all GeoPress® bottles |
|---|---|
| Active Technology | Electroadsorption + ultra-powdered activated carbon |
| Removes | Viruses (99.99%) Bacteria (99.9999%) Protozoa (99.9%) Contaminants: sediment, microplastics, PFAS, VOCs, pesticides, herbicides, heavy metals |
| Flow Rate | 8 seconds per 24 oz (5L/min) |
| Cartridge Lifespan | 350 presses / 250L (replace when press time exceeds 25–30 sec or after 3 years) |
| Shelf Life (Unopened) | 10 years |
| Size | 2.9" H × 3.1" W (7.3 × 7.8 cm) |
| Weight | 3.8 oz (108 g) |
| Materials | ABS food-grade plastic, food-grade silicone |
| Chemical-Free Operation | Yes |
| Tested To | NSF/ANSI 42 & 53, EPA Microbiological Purifier Standard |
| Origin | Cartridge media made in USA; cartridge assembled in China |
WHY YOU’RE BUYING FROM STAY READY.
We aren’t the Amazon of survival. We’re a small, opinionated shop that carries gear we’d stake our own lives on — and we back every piece with real support.
Curated
Every brand we carry has been vetted in the field by our team. If it doesn’t pass our 30-day use test, we don’t stock it.
Authenticated
Factory-direct from authorized dealers. No grey-market, no refurb, no knockoffs. Your warranty is real.
Supported
Real humans on phone, text, and email — seven days a week. We carry this gear ourselves and we stand behind it.
American
HQ in California. Orders ship from our US warehouse. US-based customer care.
PRESS-TO-PURIFY WATER BOTTLES
From a Seattle napkin sketch to the fastest, easiest portable water purifier in the world.
GRAYL started as a napkin sketch in a Seattle bar — an obsession with making the perfect portable water purifier. The first Kickstarter raised over $250,000, and today GRAYL's GeoPress and UltraPress let you press-purify water from streams, hotel sinks, wells, and lakes in seconds. The mission is straightforward: empower adventure with clean, safe water anywhere. A minimum of 1% of every sale goes to environmental charities and non-profits.
- Founded in Seattle, Washington
- Originated from a napkin sketch in a hometown Seattle bar
- Kickstarter campaign raised over $250,000
- GeoPress and UltraPress — press-to-purify in seconds
- 1% of every sale donated to environmental nonprofits
Answers, straight up.
Product-specific questions on the left. Shopping with SRO on the right. Both open-ended — hit us if we missed one.
How often do I replace the cartridge?
Grayl rates the GeoPress and UltraPress cartridges for roughly 250 litres (about 65 gallons), or three years from first use, whichever comes first. Heavily silted or turbid water shortens that, so replace sooner if press force climbs noticeably.
Which cartridge fits which bottle?
They are not interchangeable. The GeoPress cartridge fits the 24oz GeoPress and GeoPress Ti. The UltraPress cartridge fits the 16.9oz UltraPress and UltraPress Ti. Match the cartridge to your bottle line.
Does it remove viruses, or only bacteria?
Both. Grayl calls these purifiers rather than filters because the electroadsorptive media captures viruses as well as bacteria and protozoa. Activated carbon then adsorbs chemicals and improves taste, and mechanical filtration takes out particulates and microplastics.
How long does shipping take?
Most in-stock orders are processed within 1 to 3 business days, not counting weekends and federal holidays. Special-order, dealer-direct, custom, and LYNX Survival Systems orders can take longer. Lead times shown on product pages are estimates, not guarantees.
Typical carrier transit after that: Economy 5 to 7 business days, Expedited 2 to 3, Overnight 1. These are carrier estimates, not guarantees. Some items, such as lithium batteries, aerosols, and safety matches, may be limited to ground shipping.
Free Economy shipping on qualifying orders over $150 to the contiguous US, on eligible products. Oversized, heavy, freight, hazardous-material, dealer-direct, custom-built, and special-order items may be excluded. Oversized and freight items, such as rooftop tents, recovery equipment, and Pro Eagle products, may carry extra shipping charges. If extra charges apply, we'll let you know before the order ships.
Some items ship directly from the manufacturer or a supplier partner on their own schedule, so an order can arrive in more than one package with more than one tracking number. Full details: Shipping Policy.
What’s your return policy?
You have 30 days from receiving your order to request a return on eligible items. Email info@stayreadyoutdoors.com with your order number, the item, and the reason, and wait for return authorization before you ship anything back. Returns sent without authorization may be refused.
Items must come back in like-new condition: unused, unmodified, unworn, unwashed, and free of odors, dirt, stains, pet hair, and damage, with all original packaging, manuals, accessories, and tags, plus proof of purchase.
For standard parcel items, you pay return shipping unless the return is due to our error, shipping damage, or a verified defect. If we provide a prepaid label, its cost may be deducted from your refund. For oversized, freight, dealer-direct, and special-order items, you pay return shipping unless the item arrived damaged, defective, or incorrect. Original shipping charges aren't refunded. Some items may carry a restocking fee of up to 15%, and we'll tell you during authorization.
Some items are fulfilled by third-party suppliers and follow that supplier's return policy, so eligibility, refund timing, return shipping, and restocking fees may differ.
Approved refunds go to your original payment method. Allow up to 10 business days after approval, and your bank may take longer to post it. Full details: Return & Refund Policy.
What can’t I return?
These can't be returned or refunded, except where the law requires it:
- Engraved, personalized, customized, and built-to-order products, and special-order products obtained specifically for you
- LYNX Survival Systems survival kits, custom IFAKs, and custom medical kits
- Agency, government, organizational, and contract-built orders
- Gift cards, and sale or clearance items marked final sale
- Food, drink, and other perishable products, including emergency food
- Personal care, hygiene, and beauty products
- Hazardous materials, and flammable liquids or gases
- Opened or used medical products
- Opened water treatment or purification products with broken factory seals
- Anything marked non-returnable on its product page
For built-to-order, custom, and special-order items, exceptions may be made only for verified manufacturing defects, shipping damage, or fulfillment errors. For food and drink, replacements may be issued only for verified manufacturing defects or shipping damage reported within 5 days of delivery, with photos.
Not sure whether an item qualifies? Email info@stayreadyoutdoors.com before you order.
Do you ship outside the contiguous US?
Alaska, Hawaii, Puerto Rico, Guam, and other U.S. territories aren't eligible for free shipping, and extra freight charges may apply. If your order needs a shipping quote, we'll contact you before it ships. If you decline the quote, the order may be canceled and refunded. APO/FPO addresses are also excluded from free shipping.
International shipping is available on select products and destinations, and some products may be restricted from international shipping. You're responsible for import duties, taxes, customs fees, brokerage fees, and meeting your country's import rules.
Full details: Shipping Policy.
My package arrived damaged. What now?
Inspect your order when it arrives. If anything is damaged, defective, or wrong, email info@stayreadyoutdoors.com within 7 days of delivery (5 days for food and drink) with your order number, a short description, and photos of the item and the packaging.
You don't pay return shipping on items that arrived damaged or wrong, or with a verified defect. Some items fulfilled by third-party suppliers follow that supplier's policy instead. Reporting after 7 days may limit our ability to pursue a claim with the carrier, and while we may help with a carrier claim, approval is up to the carrier.
Package lost or never arrived? Contact us within 7 days of the expected delivery date. For freight deliveries, inspect the shipment before you sign and note any visible damage on the carrier's delivery receipt.
Can I talk to a human before buying?
Yes. Call (562) 294-6269, Monday to Friday, 8:00 AM to 4:00 PM Pacific time, or email info@stayreadyoutdoors.com. We reply within one business day.
We'd rather talk you out of a kit that doesn't fit your mission than sell you the wrong one.
Do you offer a military/first-responder discount?
Yes. Current and former U.S. military, military spouses and dependents, and first responders, including law enforcement, fire, and EMS, can save up to 10% on most of our products through GovX ID.
Verify on our GovX discount page and you'll get a single-use code to enter at checkout. For later orders, log in with GovX ID for a new code (limit one code per day). The GovX code can't be combined with other discounts.