16.9oz UltraPress® Purifier - Covert
The Grayl UltraPress® Covert Edition delivers clean, safe drinking water from virtually any freshwater source in just 10 seconds. Designed for travelers, protection teams, and professionals operating in environments where tap water can't be trusted: this system provides standalone filtration and purification in a compact, rugged bottle. No setup. No pumping. No problem.
"A prudent person foresees danger ahead and takes precautions. The simpleton goes blindly on and suffers the consequences. - Proverbs 27:12"
Global Field Utility
Purifies water from taps, streams, and wells: ideal for overseas travel, remote deployments, and protection teams working in austere environments.
Removes Pathogens & Contaminants
Neutralizes viruses, bacteria, and protozoa while filtering particulates, microplastics, heavy metals, and harmful chemicals (including PFAS and VOCs).
10-Second Filtration
Produces 16.9 oz of purified water in under 10 seconds using a simple, bodyweight-assisted press.
Travel-Ready & Tactical
Compact enough for carry-on luggage or kit bags. Covert design with no visible branding for discreet field use.
Built to Last
Drop-tested to 10 feet, replaceable purifier cartridge rated for 300 cycles (150L), with 10-year shelf life when stored properly.
Separate the Inner Press from the Outer Cup.
Fill Outer Cup from a freshwater source.
Vent the SimpleVent® spout cap ½ turn.
Press the Inner Press down with steady force.
Drink immediately or transfer purified water as needed.
The numbers, flat and honest.
| Capacity | 16.9 fl oz (500 mL) |
|---|---|
| Weight | 12.5 oz (354 g) |
| Dimensions | 9.75" H × 2.95" Dia |
| Filtration Rate | 10 sec per cycle (3L/min) |
| Removes | Viruses (99.99%) – Rotavirus, Hepatitis A, Norovirus Bacteria (99.9999%) – E. coli, Cholera, Salmonella, Dysentery Protozoa (99.9%) – Giardia, Cryptosporidium, Amoebae |
| Filters | Sediment, microplastics, pesticides, herbicides, heavy metals, VOCs, PFAS, odors, and flavors |
| Filter Type | Electroadsorption & ultra-powdered activated carbon |
| Cartridge Life | 300 presses / 150L (replace at 25-second press time or after 3 years of use) |
| Shelf Life (unopened) | 10 years |
| Construction | BPA-free polypropylene #5, TPE, food-grade silicone and ABS plastic |
| Durability | Survives 10 ft drop fully filled |
| Testing | Exceeds NSF/ANSI protocols 42 & 53; EPA microbiological purifier standard |
| Origin | Cartridge media made in USA; bottle made 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 long does shipping take?
Most orders process within 1–3 business days from our warehouse. From there: 5–7 business days economy, 2–3 business days expedited, or overnight if you need it fast. Free economy shipping on orders over $150 (contiguous US). Alaska, Hawaii, and Pro Eagle / freight items are quoted at checkout. You’ll get a tracking number and link the moment your order ships.
What’s your return policy?
30 days from the day your order arrives. Gear has to come back unused, with all original tags, stickers, and packaging intact. For standard items we’ll send a prepaid return label and deduct return shipping from your refund. Oversized or freight returns are on you, unless the item showed up damaged, defective, or wrong — in which case we cover it.
Refunds hit your original payment method within 10 business days of approval.
What can’t I return?
Final-sale items, gift cards, food and drink products, personal-care items, anything customized or engraved, briefs (hygiene), and hazardous materials. If you’re not sure whether something qualifies, email us before you order — we’ll tell you straight.
Do you ship outside the contiguous US?
Yes. Alaska, Hawaii, and US territories ship on freight-quoted rates calculated after checkout. International orders are available worldwide at variable rates; duties and import fees are the customer’s responsibility. EU customers get a 14-day cancellation window per EU consumer law, on top of our standard return policy.
My package arrived damaged — what now?
Email info@stayreadyoutdoors.com within 7 days of delivery with your order number and clear photos of the damage (product + packaging). We’ll replace, refund, or ship a return label on us — no back-and-forth. Damaged, defective, or wrong-item claims never cost you shipping.
Can I talk to a human before buying?
Yes. Email info@stayreadyoutdoors.com — we answer every message ourselves, usually within a few hours during business days. We carry this gear, we use this gear, and 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. Active-duty and veteran military, police, fire, EMS, and medical first responders get 15% off every order. Verify through GovX at checkout — one-time, secure, and reusable across thousands of brands. Discount applies automatically once you’re verified.