This bundle includes our unique and versatile 28mm filter kit which can be threaded directly onto the 28mm opening of each Stow bottle or quickly paired with our best-selling Contour 2L hydration reservoir. This versatile connectivity makes our filter a great backcountry water treatment solution whether you are squeezing your water from your 1L Stow into another container or filtering as you drink on the go from your reservoir or smaller Stow 500ml bottle. 

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