Grayl Ultrapress One-Way Valve. Replacement valve compatible with the Grayl Ultrapress water filter.

The Ultrapress bottle comes with an integrated one-way valve, allowing you to add electrolytes, drink mixes, and other flavorings directly into your Ultrapress water filter bottle.

The valve is located in the filter and prevents water from flowing back into the filter, so you can add flavor or anything you like to your purified drinking water without affecting the filter.

This valve fits the Ultrapress Water Filter.

You can also find the one-way valve for the GeoPress Water Filter bottle, which is slightly larger than the Ultrapress.

Find all water filtration gear from The Grayl here

The valve is dishwasher safe.

Specifications for Grayl GeoPress One-Way Valve:

Weight: 10 g

Material: BPA-free silicone