HydraPak UltraFlask+ Filter Cap

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

Minimal design and lightweight materials make this filter the ideal choice for runners. It takes up no extra space when stored or threaded directly onto a flask.

Easy to drink bite valve auto-seals after each sip, eliminating annoying drips.

Plugs into filter valve and threads onto a bottle of clean water for backflushing the filter to restore its flow rate.