Overview
Drink-Mix & Electrolyte Ready! Compact, discrete, and ridiculously easy to use — the UltraPress® Covert Edition fits into any pack pocket (or cup holder), requires zero setup, and makes 16.9 ounces of clean purifier water in a blazing fast 10 seconds (3L/min). Stealth on-the-go filtration and purification for the hiker, backpacker, hunter, or global adventurer seeking discretion and fast-flow purified water for drinking, filling hydration reservoirs, or cooking.
Virtually no setup time, and fast performance, UltraPress® purifies and filters contaminated water in 10 seconds (3 liters per minute) from any water source. From adventure travel to survival make the world’s sketchiest freshwater sources clean to drink from.
Grasp the Inner Press with one hand and the Outer Cup with the other, then pull apart. A quick twist helps to initiate separation.
Fill from a stream or lake, or from any bathroom sink or rustic hostel tap.
Twist the SimpleVent® cap 1/2 turn to allow air to vent during purification process. Utilizing your body weight, press with steady downward force.
Fast and easy; makes safe drinking water in 8 seconds - anywhere!
The silicone One-Way Valve prevents liquid from reversing direction and flowing back into the filter Cartridge. Allowing the use of electrolytes, drink mixes, and other beverages with your Grayl UltraPress® Filter & Purifier Bottle.
ADD AN EXTRA CARTRIDGE AND VALVEBy Clicking the Link
Bring the UltraPress® along for the ride as your empty lightweight vessel. There is no need to carry along a bottle thats heavy and filled to the top. Just Fill. Press. Drink. and be on your way with your empty Grayl.
SHOP BOTTLELOCK HIP PACKSBy Clicking the Link
This reliable all-day companion is designed to keep up with your active lifestyle, fitting effortlessly into any pack pocket with its compact 16.9 fluid ounce size. Stay hydrated on the go with each river fill-up, and savor the taste of the water at your feet with UltraPress®.
RiverFlow® Spout
A wide contoured spout delivers a fast flow of water.
SimpleVent®
Twist the cap 1/2 turn to vent air during purification process.
SoftPress®
Comfortable pressing pad provides for an ergonomic, non-slip large pressing surface.
FlipCarry®
Rotates 90° allowing for easy carry and effortless separation of Inner Press from Outer Cup.
16.9 fl oz (500 ml) of clean, filtered and purified water. NOTE: Dirty water never enters the Inner Press.
Filters & purifies 10 seconds per 16.9 fl oz (3 liters/minute).300 presses (150L/40 gal)
Removes viruses plus bacteria and protozoa. Improves taste, smell and clarity. Filters microplastics, PFAS, and lead.
TopoGrip® Surfaces
Durable, tactile non-slip grip material placed on all heavy use surfaces.
Max Fill Line
A maximum fill line is located on the backside of the Outer Cup. 16.9oz (500ml).
Non-Slip Base
Soft, non-slip base provides durable protection.
To maximize the lifespan of a cartridge, always choose the clearest water. GeoPress® cartridges deliver ~350 cycles (250 liters / 65 gallons) while UltraPress® offer ~300 cycles (150 liters / 40 gallons). Water quality matters; avoid silt and sediment. Preemptively filter out silt and sediment with a handkerchief or t-shirt to extend the life of a cartridge.
The time it takes to press with your GeoPress® or UltraPress® will gradually increase over time. We recommend replacing the cartridge once the 'press time' reaches approximately 25 seconds (or three years have passed since the first use). Please note that colder water may require longer pressing time and does not necessarily mean the cartridge needs to be replaced.
An unused and airtight cartridge can be stored for up to 10 years. Once opened, use it for 3 years or until press time is ~25 seconds.
GeoPress® and UltraPress® cartridges filter and purify most freshwater sources. Avoid using them with salty or brackish water. When treating freshwater, start with the cleanest water available, such as streams and rivers.
Grayl's activated carbon effectively adsorbs many chemicals, pesticides, herbicides, heavy metals, etc. However, it is not designed for industrial disasters, coal ash spills, high lead levels, mercury, nuclear disasters, high tannin concentrations, or water with toxic blue-green algae (e.g. cyanobacteria). Find another water source in those situations.
Grayl® cartridges contains non-woven ceramic fibers that have a high electropositive charge. These fibers effectively block and trap microorganisms and particulates, ensuring that submicron contaminants are removed through electroadsorption. Additionally, the cartridge is equipped with ultra-powdered activated carbon, which efficiently adsorbs chemicals, heavy metals, bad flavors, and odors.
To avoid contamination, use the Spout Cap. If dirty water comes in contact with the Inner Press, wash the Grayl (not the cartridge) with soapy water and rinse thoroughly. Alternatively, dilute contaminants by pressing and agitating water through a GeoPress® or UltraPress® purifier bottle 5-7 times.
Proper maintenance for your GeoPress® or UltraPress® is crucial for optimal performance. After your adventures, ensure to follow these simple steps to keep your purifier in top shape. Start with a 'dry press' by pressing the wet purifier into the empty Outer Cup and disposing of excess water. Next, remove the cartridge and allow it to air-dry for 2-4 days. For the remaining components, hand wash them with warm, soapy water and let them air-dry. To maximize the lifespan of the cartridge, store the unit assembled. With proper care, the cartridge can last up to three years.
Yes, experience the hydration benefits of electrolyte-infused water in a UltraPress® or GeoPress® when equipped with a One-Way Electrolyte & Drink-Mix Valve (available since April 2023).
Always add electrolytes into the clean drinking water side. Avoid adding flavoring or electrolytes directly into a cartridge not equipped with a One-Way Drink Mix Valve, as it can diminish the cartridge's lifespan and efficacy. In those situations, pour the clean drinking water into another water vessel and then add electrolytes or flavorings.
Size, capacity and weight! Both models offer the highest level of protection from waterborne pathogens (99.99% of virus, 99.9999% of bacteria, and 99.9% of protozoan cysts, including Rotavirus, Hepatitis A, Norovirus, Giardiasis, Cryptosporidium, E. Coli, Cholera, Salmonella, Dysentery). They also filter many heavy metals, chemicals, and microplastics.
GeoPress® filters and purifies 24 oz of water, ideal for individuals and groups looking for a high capacity. UltraPress® purifies 16.9 oz and is great for individuals with limited space or when traveling with small pack side pockets.
Grayl® filter and purifier bottles are made from: BPA-free polypropylene #5, food-grade silicone, TPE and ABS food-grade plastic. Our products are designed in Seattle, Washington, and manufactured by our partners in China with the exception of our cartridge media which is produced in the United States.
