You're in the right place to quickly get adventure ready with your Grayl UltraPress® Bottle.

Grayl Ultrapress Quickstart Guide


The Grayl UltraPress® is fast and ridiculously easy to use, and it's packed with features. Fill, press, and drink! That’s the nuts and bolts of making clean, great tasting water with Grayl.


Grasp the FlipCarry™ Handle with one hand and the Outer Cup with the other, then pull apart.


Scoop from a stream or lake, or fill from any sink or rustic global tap.


Twist the SimpleVent® cap a half-turn to allow air to vent during filtration & purification process.


Utilizing your body weight, press with steady downward force, palms on either side of the cap.


Ridiculously fast and easy; makes clean drinking water in ~8 seconds - anywhere!


Bring an extra bottle or hydration reservoir to store larger capacities of clean, great tasting water.


Proper removal and installation of an UltraPress® cartridge prevents cross-contamination.


Locate the cartridge “lock tab” at bottom of Inner Press. Then pull out the “lock tab”and unscrew the cartridge counter-clockwise (lefty loosey) until it separates from the Inner Press.

line drawing of holding cartridge in two hands, pulling tab out with finger and rotating counter-clockwise


Firmly grasp Inner Press, then insert cartridge into bottom of Inner Press.

line drawing of inserting cartidge into bottom of Grayl


Rotate the cartridge clockwise (righty tighty) until you feel the 'lock tab' firmly click into the lock slot. Do not over tighten.

line drawing of rotating the cartidge clockwise and the click that will result


Never wash the cartridge with soap or other cleaning agents. Soap will damage the cartridge media. You may rinse a cartridge with clean water as needed.


Thoroughly dry cartridge by performing 1-2 'dry presses' (pressing without any water in the bottle) and empty excess water. Remove cartridge and allow it to air dry completely (depending on humidity it can take 2 - 4 days). Hand wash all other parts with warm, soapy water. Reassemble UltraPress to create air tight seal for storage. Cartridges can last up to 3 years after opening if cared for properly between uses.


Thoroughly dry cartridge by performing 1-2 ‘dry presses’ by pressing the wet Cartridge into an empty (no water) Outer ReFill and dump excess water. Allow cartridge to air-dry overnight.



Cartridges are not significantly degraded after one freeze/thaw cycle. However, don’t use a cartridge after 3 or more freeze/thaw cycles. Protect your GeoPress® in freezing temperatures by keeping it full of water and insulate in a jacket or sleeping bag.


UltraPress® makes clean drinking water in a blazing fast 10 seconds for your filtration and purification needs. It's great for producing clean water for hydrating, cooking meals, or making coffee.


The UltraPress® fits in any cup holder or pack pocket for easy transport and hydration within arm's reach.


An UltraPress cartridge is rated for ~300 cycles (150 liters / 40 gallons); GeoPress cartridge for ~350 (250 liters / 65 gallons). The effective lifespan of a cartridge varies depending on the quality of the water sources—the clearer, the better. High levels of silt or sediment will shorten the lifespan of a cartridge. To maximize the effective lifespan of your cartridge always choose the clearest water available. If necessary, pre-filter the water using a handkerchief or t-shirt as you fill the Outer Refill.

As you use your Grayl purifier, the ‘press time’ will slowly increase with use. When ‘press time’ reaches ~25 seconds (or three years have elapsed since first use), it is time to replace your cartridge. Note: Especially cold water may take longer to press and does not indicate your cartridge needs to be replaced.

Stored under proper conditions, an unused (and airtight) cartridge has a shelf life of 10-years. Once a cartridge has been opened, it may be used for up to 3-years or until press time reaches ~25 seconds, indicating it is time to replace the cartridge.

Grayl cartridges can filter and purify virtually any freshwater source. The cartridges cannot desalinate water, so stay away from salty or brackish water. When purifying freshwater, always begin with the cleanest (least silty) water available. For instance, streams and rivers are generally better than lakes and bogs, which often have higher levels of sediment and tannins. Grayl cartridges are designed to remove low levels of chemicals and heavy metals but are NOT designed to protect against industrial disasters, coal ash spills, very high lead levels, mercury, nuclear disasters, high tannin concentration or water that contains toxic blue-green algae (cyanobacteria). In these conditions, it’s important to find another water source.

Grayl products use electroadsorptive media to capture pathogens and inorganic contaminants as dirty water is pressed through the cartridge. As water passes through the purifier media in the cartridge, 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) permanently bind to the media and activated carbon absorbs chemicals, heavy metals, and eliminates bad tastes and smells. After the press, water is ready to chug, sip or store for later.

Thanks to the Spout Cap, it is easy to avoid cross contamination from the environment or untreated water. However, if dirty water does come into contact with the Inner Press, disassemble and wash the Grayl (not the cartridge) with soapy water and rinse thoroughly. Alternatively, thoroughly dilute potential contaminants by pressing and agitating water through the Grayl Purifier 5-7 times.

Before putting your Grayl away after an adventure, dry out the cartridge to prevent growth of mildew and odors. Thoroughly dry the cartridge by performing one ‘dry press’ by pressing the wet purifier into an empty (no water) Outer Refill and dumping excess water. Allow the cartridge to air-dry thoroughly (depending on humidity it will take 2-4 days to completely dry). Hand wash all other parts with warm, soapy water. For long-term storage, reassemble the unit to create an airtight seal for storage. Cartridges can last up to three years after opening if cared for properly between uses.

Yes, you may add electrolytes, drink mixes and other flavorings into your GeoPress® when it is equipped with a New! GeoPress® Cartridge (V2) and a One-Way Electrolyte & Drink-Mix Valve.

For bottles equipped with a cartridge sold pre-April 2023, we do not recommend adding flavoring or electrolytes directly into your GeoPress® because it can decrease the lifespan and efficacy of your cartridge. Instead, we recommend you pour your clean drinking water from your Grayl into another water vessel containing electrolytes or flavorings. Alternatively, upgrade to a GeoPress® Cartridge (V2) and add a One-Way Valve.

Both the UltraPress and the GeoPress 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) as well as many heavy metals, chemicals, and microplastics.

The GeoPress filters and purifies 24 ounces of water with each press and is the best option for groups and individuals looking for a higher capacity option.

The UltraPress filters and purifies 16.9 ounces with each press. The compact design is ideal for individuals looking to maximize space as the bottle fits in most backpack side pockets, bike water bottle cages, and cup holders.

Grayl products are made from: BPA-free polypropylene #5, food-grade silicone & ABS thermoplastic polymer. Purifiers are designed in Seattle, Washington, the purification media is produced in the United States and the bottle components by our manufacturing partners in China.