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Science
12 April 2025

Grayl And Montana Knife Co. Launch Durable Water Purifier

The new MKC x Grayl GeoPress Ti offers enhanced filtration and versatility for outdoor adventurers.

In the ever-evolving world of outdoor gear, the latest collaboration between Grayl and Montana Knife Co. has introduced a remarkable upgrade to the well-loved GeoPress Ti water purifier. The MKC x Grayl – 24-ounce GeoPress Ti Purifier not only enhances durability but also simplifies the water filtration process, making it an appealing option for adventurers.

Grayl's new purifier set boasts a Grade 1 Titanium exterior, which serves a dual purpose; it’s robust enough to withstand the rigors of the wild and can also function as a cook pot. Users can fill the exterior with water, press down the cartridge, and in just 8 seconds, Grayl claims it can filter water from any source, even the most questionable.

This limited-edition collaboration features a stylish, laser-engraved gold logo from Montana Knife Co., which adds an aesthetic touch to its rugged functionality. The GeoPress Ti has already garnered accolades, winning GearJunkie’s Best Water Filter Bottle award, thanks to its innovative design and efficient performance.

Grayl's filtration technology utilizes electroabsorption and activated charcoal, effectively purging water of contaminants such as sediment, bacteria, and a host of pathogens. According to Grayl, the purifier is capable of removing rotavirus, hepatitis A, norovirus, giardiasis, cryptosporidium, E. coli, cholera, salmonella, dysentery, and more. Additionally, it filters out heavy metals, chemicals, viruses, and microplastics, making it a comprehensive solution for clean drinking water.

In terms of performance, the GeoPress Ti can filter 24 ounces of water in just 8 seconds, or at a rate of 5 liters per minute. The cartridge boasts a lifespan of 350 cycles, translating to about 65 gallons of purified water before needing replacement. Replacement cartridges are available for $30 through Grayl.

Durability is a hallmark of this new design; the exterior can reportedly endure a 10-foot drop onto concrete when full. This impressive resilience is attributed to the CP4 Grade 1 titanium, which has a remarkable strength-to-weight ratio. A black titanium PVD coating adds further protection against abrasion, corrosion, and heat, making it an ideal companion for outdoor cooking. Users can even place the vessel directly into campfire coals for heating.

The cook lid features a strainer for those who prefer to brew cowboy coffee, along with a D-ring for easy removal from hot surfaces. Montana Knife Co.’s co-founder and Master Bladesmith, Josh Smith, emphasized the brand's commitment to creating quality products at affordable prices, stating, "We continue to make products for working people at a quality they can be proud of and a price they can afford." The MKC x Grayl GeoPress Ti is priced at $250, which is $30 more than the original version of the GeoPress Ti.

As outdoor enthusiasts seek reliable and versatile gear, the MKC x Grayl GeoPress Ti stands out as a premium choice for hunters, hikers, and travelers alike. Its combination of style, functionality, and durability makes it a worthy investment for those who prioritize clean water on their adventures.

In addition to the GeoPress Ti, the Hydrapak Flux 1.5L has also emerged as a favorite among adventurers. This collapsible soft bottle filter weighs only 5 ounces and rolls down for compact storage, making it perfect for backcountry travel. The Flux features a hollow fiber filter with a 0.2-micron pore size, designed to effectively filter harmful bacteria, protozoa, and microplastics.

During testing in Cochamó, Chile, the Hydrapak Flux demonstrated its ability to handle turbid waters after heavy rains, with only a small amount of sediment settling at the bottom of the bottle. In just over 30 seconds, testers enjoyed high-quality, clear, and great-tasting water.

The Flux 1.5L is constructed from abrasion-resistant TPU and features welded seams for added durability. Hydrapak offers a lifetime warranty on their products, ensuring peace of mind for users. Although the advertised flow rate is one liter per minute, testers consistently recorded treatment times between 28 and 38 seconds, showcasing its efficiency.

Measuring 10 by 4.5 inches when filled, the Hydrapak Flux is shipped ready to use, requiring no setup. Users simply fill the bottle with water, and the twist-to-drink nozzle allows for easy hydration on the go. Its design includes a dust cap to protect the mouthpiece from dirt, making it a practical choice for outdoor activities.

While the Flux 1.5L is slightly more expensive than other collapsible designs, its durability and user-friendly features make it a standout option. Competing products like the LifeStraw Peak Squeeze and Katadyn BeFree 0.6L offer alternatives, but the Flux remains a top choice for those seeking reliability in their water filtration system.

In summary, both the MKC x Grayl GeoPress Ti and the Hydrapak Flux 1.5L represent significant advancements in portable water filtration technology. As outdoor enthusiasts continue to prioritize health and safety in their adventures, these products provide effective solutions for accessing clean drinking water in even the most challenging environments.