Hydrapak Ultraflask Bottle Cap

Run fast, filter faster. The Ultra Flask+ Filter Cap threads seamless onto all of HydraPak’s 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.

Features:

- Easy To Use
- High Flow
- Lightweight And Compact

Fast & Safe Filtration:
- The integrated filter removes Escherichia coli bacteria, Cryptosporidium parvum cysts, and Giardia Lamblia from approximately 1,500 liters of water at a rate of >1L per minute.*

Light And Compact:
- 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.

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

42Mm Thread Compatible:
- Easily thread the filter onto some of the most popular running soft flasks, flexible bottles and water storage containers.

Included Backflush Adapter:
- Plugs into filter valve and threads onto a HydraPak Stow or bottle of clean water for back flushing the filter to restore its flow rate.

Specifications:

- Weight: 36 g / 1.3 oz
- Dimensions: 42mm
- Material: ABS, POM, Silicone, Hollow Fiber

Care:

- Avoid freezing filter. Freezing may ruin the hollow fiber membrane. If in freezing conditions we recommend you keep the filter in your pocket or near your body to prevent freezing.