, , ,

Hydrapak 42MM Filter Cap


Pump up your water game with the Hydrapak 42MM Filter Cap, designed for on-the-go filtration.

With its secure threading, it easily attaches to all sizes of HydraPak’s Seeker and Flux flexible bottles, quickly transforming them into filtration solutions. This revolutionary product offers a convenient solution for those looking for clean drinking water during their travels or outdoor adventures.

Light and Compact:

At only 57 grams, our filter is one of the lightest filter options available. Its small size takes up no extra space when stored or threaded directly onto a Seeker or Flux.

Dust Cover & High-Flow Nozzle:

Keeps dust off your drink nozzle. Quickly opens and closes the drink nozzle with one hand without any direct contact with dirty hands.

42MM Thread Compatible:

Easily thread the filter onto some of the most popular backpacking water storage bags and flexible bottles including the HydraPak Seeker 2L, 3L, 4L, and 6L and 1L and the Flux 750ML, 1L, and 1.5L

Fast & Safe Filtration:

Removes 99.99% of E Coli & Parasitic cysts. Filters approximately 1,500 liters of fresh water at a rate of >1 L per minute.


Filter removes Escherichia coli bacteria, Cryptosporidium parvum cysts, and Giardia Lamblia (99.9%) from approximately 1,500 liters of water.

Safe and Reliable:

100% BPA and PVC Free

Availability: In stock