HydraPak Ultraflask 42mm Filter Cap bis_hidden Generous 475ml capacity for more

Generous 475ml capacity for more of your favorite hot or cold drink

Weight: 960 g

Easily thread the filter onto some of the most popular backpacking bottles and flasks including the HydraPak Stow 500ML and 1L and the 1L Smart Water Bottle

Filters at >1L/minute

HydraPak Ultraflask 42mm Filter Cap bis_hidden Generous 475ml capacity for moreFiltration For Runners Overview Run fast, filter faster. The UltraFlask+ Filter Cap threads seamless onto all of HydraPaks 42mm running flasks and handhelds for a lightweight, straightforward filtration solution. Featuring a traditional bite valve and cap design, runners can drink freshly filtered water directly through the high flow Blaster valve. *Effectively removes common waterborne bacteria, such as E. coli (99. 999%) and parasitic cysts (99.